Resize droplet through dashboard and finished, but the size is still same

Hi, I have a droplet which running with 2gb RAM and 26GB disk. Now, I need to resize it into 3gb RAM and 60GB disk or above that.

I also have resized it twice, one with 3gb ram, and second with 4gb ram which have 80GB disk.

But the problem: when i go into my server through ssh, the storage disk is still same. 26GB and not increased.

current spec: / 4 GB Memory / 80 GB Disk / SGP1 - Ubuntu 18.04.1 x64 when i run df -H command

Filesystem Size Used Avail Use% Mounted on udev 2.1G 0 2.1G 0% /dev tmpfs 414M 938k 413M 1% /run /dev/vda1 26G 16G 11G 60% / tmpfs 2.1G 8.2k 2.1G 1% /dev/shm tmpfs 5.3M 0 5.3M 0% /run/lock tmpfs 2.1G 0 2.1G 0% /sys/fs/cgroup /dev/vda15 110M 3.6M 106M 4% /boot/efi overlay 26G 16G 11G 60% /var/lib/docker/overlay2/56c8f51f0c0b75168b729d598716146e8ffb68604acf7c448817e226b09398d8/merged overlay 26G 16G 11G 60% /var/lib/docker/overlay2/5cb36bb7ab70e70f940614d87254622553d2d448bfe5f03c958f45d3984d1c3c/merged overlay 26G 16G 11G 60% /var/lib/docker/overlay2/9ac08e3712a8bd4dd4543c82afbd65b0d1158c6a8ae6eb5644a350179d946feb/merged shm 68M 0 68M 0% /var/lib/docker/containers/8d333bb43599fa2e26eb0dbae657d1349a8c76d211838b47d88eb31ae2edb299/mounts/shm shm 68M 0 68M 0% /var/lib/docker/containers/de7b1d4562aedf152eaec9e373d6186b8e7eb7ed87d191228febb3bf1645a2e1/mounts/shm shm 68M 0 68M 0% /var/lib/docker/containers/459df6711c82334f120e35b0b74ef42f1075fc9b6766b00e851236f916ca3d8c/mounts/shm tmpfs 414M 0 414M 0% /run/user/0