I enrolled the plan at the end of Jun for cover starting Aug 1. The first week of July, I received a billing asking for the payment from April to end of July that I never signed up for. I called them up to have the record fixed, I called them almost every day, spent three to four hours each time on the phone for 2 months now. They turned me around and around, told me to escalate and appeal. Marketplace appeal center said that this is not under their authority. I never got a answer or get the problem solved. I don't know what to do, I guess I just wait to have it solve in court. I want to give a negative number in rating but it is not available.