I am facing the same issue and a lot of mine friends too. When we try to mail them they response with a automatic mail I guess. That you account is flagged due to location inconsistencies. I have never got any VPN access and never changed the devices to login the account. This is some real problem which Fiverr need to fix as soon as possible. It's so strange that out of no where they are doing with a lot of people.
FIX THIS FIVERR