It is not possible to delete backups manually or through technical support. All backups can only be deleted automatically when the backup expires.
There are situations when a large queue of requests in the process of execution appears on the backup server, which can cause delays in processing new requests. If you urgently need a backup copy of the current version of the site and / or its database, in this case it is better to resort to downloading the site through filemanager, via FTPclient or by SSH... You can export the database using one of the import methods presented here.
In section "Backup » при creating backups backup, a list of all available backups is displayed. If a copy for the required date is not in the list, then it is not on the hosting and it will not be possible to receive or restore it in any way. Copies of two-, three-month, half-year, one-year, etc. prescription are not stored on the hosting.
If the hosting account has been deleted (more than 30 days have passed since the expiration date), check its presence in the list deleted accounts.