Images Purged, Helpdesk of no help.

Once the time limit on deleted items is exceeded, no help restoring? Who to contact when Helpdesk isn't helping?  

File folder "Pictures" deleted from One Drive to Recycle Bin - not able to restore as immediately says Error when trying to restore folder.  I have lost 2 years of pictures and One Drive help desk continuously asks for permission to look into it, file name, location dates etc.

I've repeatedly given them - now folder is no longer in recycle bin.  Who can I escalate this to, or get to have this restored.  There must be a backup of this folder somewhere???