Please contact support to reinstall your VPS in-place. All data inside your VPS will be lost, but it will keep the IP address and all the settings.
We will do it free of charge, but not that often than approximately once per month.
If you want to keep some of your settings or files, please contact V3next Managed Hosting department at firstname.lastname@example.org, we will help you for an additional fee.
To make clear what is what:
lsblk -o NAME,FSTYPE,SIZE,MOUNTPOINT,LABELOR
sudo lsblk -o NAME,FSTYPE,SIZE,MOUNTPOINT,LABEL
(this will help you to understand what block devices you have and what can be easily preserved during reinstall, and what require some more work)