How can I solve disconnected problem of my droplet?

Several days ago, I received email from digital ocean support. “We are writing to let you know that your Droplet ubuntu-Realtourhub at 134.209.8.52 has been disconnected from the network after it contributed 242.3 Mbps to a 16.9 Gbps Distributed Denial of Service attack. The network traffic from your Droplet matches a pattern of malicious traffic originating from other Droplets targeted at a specific victim. We understand how disruptive this may be to your work; however, it was critical for us to disconnect your Droplet to reduce further harm.” And there were 3 paths to solve solution.

So after that, I recover and rebuilt my droplet. But my droplet have been disconnected yet. I’m really in hurry. I sent email to digital ocean support. But yet there is no solution and reply. Please help me kindly. How can I use network of my droplet?

Thanks. Best Regards.