You should be able to access this account now.
Reminder: There is a limit of 1 account per user so this account has been unblocked, but your other one will not be.
As the error message says, multiple accounts have been detected and can only be addressed at https://community.x10hosting.com/threads/multi-account-unblock-requests.209963/
Disk space will only be incrementally increased after requesting for more disk space.
Key requirements:
Must be currently using at least 75% of current diskspace
Account must be at least 7 days old
Disk usage verified for compliance with TOS
There is nothing more than can be done as it has already been explained on here and Discord, the data is fully gone (no longer there) and is unable to be recovered.