Sorry if it sounds dumb. I never knew VPN services provided email. Only thought tempmail had an expiration. I don't use VPN's much. If it's okay, can you tell which VPN provider gives this kind of facility or which one you used? 
There are several VPN services which can also provide an email for a price or as it was in my case as a temporary promotion, I used torguard, which for obvious reasons I cannot really recommend as an email provider.Quote
Good luck with your appeal, I hope you get back your account.
The process is still ongoing, but I hope the evidence provided is enough to prove my case.