@abdulrehmanwaheed There is not a Vivaldi support team. There are volunteer users like me who try to help other users (some of us are more tech savvy than others), and there are community admins.
If you reset remote data, it is gone. It has been replaced by the default items that come with a new install on desktop. You cannot recover it. If you have your old data on mobile from having synced previously, then when you sync mobile using the new password (if you cleared data, you had to set a new decrypt password), data from mobile will upload to the server. It will then download to desktop when desktop is synced.
If your mobile is/was synced at the time you reset the remote data, there is a chance you can wipe the mobile by resetting using a browser instance that has no data. But if it was not connected to sync when you reset remote data, especially if it has not been in use and connected to sync for a while, its data should be safe - and it should upload to the server when you sync it.
To be ABSOLUTELY safe, is there a chance you could set up a new profile? Do you for instance have a second cell phone number?