I paid for subscription, and the next minute system has logged me out and when I tried to login it is saying "Your account has been blocked due to suspicious activity.
Please contact our team to resolve the issue."

Update: Fax.Plus returned to me saying that it was blocked because I filed a payment dispute, HaHa! but I filed payment a dispute after they blocked my account, because the blocked me.
So they even can't see and explain the reason why they blocked me and trying to mess consequences with reason to explain their behavior.