How Can I reverse this redirect?

I have no idea how this happened but after moving my site (xxxx.nz) into a new droplet from my old vps, while I was generating a Let’s Encrypt certificate a 301 re-direct has appeared to a completely non related domain (yyyy.nz) on my server…

My question is - How can I best reverse This?

This is the HTTP Status:

:~$ curl -I https://xxxx.nz
HTTP/2 301 
server: nginx
date: Sun, 06 Oct 2019 23:57:55 GMT
content-type: text/html; charset=UTF-8
location: https://yyyy.nz/
expires: Wed, 11 Jan 1984 05:00:00 GMT
cache-control: no-transform, no-cache, must-revalidate, max-age=0
x-redirect-by: WordPress
strict-transport-security: max-age=31536000; includeSubdomains
content-security-policy: default-src 'self' https: data: 'unsafe-inline' 'unsafe-eval';
x-xss-protection: 1; mode=block
x-frame-options: SAMEORIGIN
x-content-type-options: nosniff 

this is the sites-enabled Host File:

:~$ cat /etc/nginx/sites-enabled/xxxx.nz

server {

    server_name xxxx.nz www.xxxx.nz;

    access_log /home/xxxx.nz/logs/access.log;
    error_log /home/xxxx.nz/logs/error.log;

    root /home/xxxx.nz/public/;
    index index.php;

    location / {
        try_files $uri $uri/ /index.php?$args; 
    }

    location ~ \.php$ {
        try_files $uri =404;
        fastcgi_split_path_info ^(.+\.php)(/.+)$;
        fastcgi_pass unix:/run/php/php7.2-fpm.sock;
        fastcgi_index index.php;
        include fastcgi_params;
    }

    listen [::]:443 ssl http2; # managed by Certbot
    listen 443 ssl http2; # managed by Certbot
    ssl_certificate /etc/letsencrypt/live/xxxx.nz/fullchain.pem; # managed by Certbot
    ssl_certificate_key /etc/letsencrypt/live/xxxx.nz/privkey.pem; # managed by Certbot
    include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
    ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot

}
server {
    if ($host = www.xxxx.nz) {
        return 301 https://$host$request_uri;
    } # managed by Certbot


    listen 80;
    listen [::]:80;

    server_name xxxx.nz www.xxxx.nz;
    return 404; # managed by Certbot


}

This is the Nginx.conf file:

:~$ cat /etc/nginx/nginx.conf

user matt;
worker_processes 4;
pid /run/nginx.pid;
include /etc/nginx/modules-enabled/*.conf;

events {
	worker_connections 4096;
	multi_accept on;
}

http {

	##
	# Basic Settings
	##

	ssl_session_cache shared:SSL:10m;
	ssl_session_timeout 10m;	
	add_header Strict-Transport-Security "max-age=31536000; includeSubdomains";
	sendfile on;
	tcp_nopush on;
	tcp_nodelay on;
	keepalive_timeout 15;
	types_hash_max_size 2048;
	server_tokens off;
	client_max_body_size 64m;

	# server_names_hash_bucket_size 64;
	# server_name_in_redirect off;

	include /etc/nginx/mime.types;
	default_type application/octet-stream;

	##
	# SSL Settings
	##

	ssl_protocols TLSv1 TLSv1.1 TLSv1.2; # Dropping SSLv3, ref: POODLE
	ssl_prefer_server_ciphers on;

	##
	# Logging Settings
	##

	access_log /var/log/nginx/access.log;
	error_log /var/log/nginx/error.log;

	##
	# Gzip Settings
	##

	gzip on;

	# gzip_vary on;
	gzip_proxied any;
	gzip_comp_level 2;
	# gzip_buffers 16 8k;
	# gzip_http_version 1.1;
	gzip_types text/plain text/css application/json application/javascript text/xml application/xml application/xml+rss text/javascript;

	##
	# Cache Settings
	##

	fastcgi_cache_key "$scheme$request_method$host$request_uri";
	add_header Fastcgi-Cache $upstream_cache_status;


	##
	# Virtual Host Configs
	##

	include /etc/nginx/conf.d/*.conf;
	include /etc/nginx/sites-enabled/*;

server {
    listen 80 default_server;
    listen [::]:80 default_server;
    server_name _;
    return 444;
}

server {
    listen 80;
    listen [::]:80;
    server_name xxxx.com;

    return 301 https://$server_name$request_uri;
}



	##
	# Security
	##

	add_header Content-Security-Policy "default-src 'self' https: data: 'unsafe-inline' 'unsafe-eval';" always;
	add_header X-Xss-Protection "1; mode=block" always;
	add_header X-Frame-Options "SAMEORIGIN" always;
	add_header X-Content-Type-Options "nosniff" always;

}

Many thanks in advance for any guidance you can offer

Matt