With appropriate knowledge & experience you can do your own restores from backups that you created. Depending on the reason for the restore you may require more or less knowledge. Any restore should be done with care. If your site was infiltrated then you do need a good understanding of whether a restore is a good idea or not. You can expect a restore to at least leave you with the same vulnerability that caused the issue in the first place, so you must update/upgrade or do whatever is needed to block that vulnerability.
If you want a restore from the Arrow Technology backups then we will have to do it for you. Our backups use a one-way mechanism where the backup servers retrieve files & data from the websites but it is not possible for the website to access the backup. This means that whilst an attacker can change the website, they cannot directly change the backup history. If you require a restore then please submit a support ticket. We can either do a full restore for you or provide you with files and/or databases.