Ybuy Trying to take me for more money, when I already paid off my phones. Atlanta Georgia

In January I purchased two IPhones from the cricket store and financed them through YBuy, with the option to pay off the phones within 90 days. At first I did not notice until March that the debit card i used to set up the account with would not allow ACH withdrawals, so I ended up sending money orders. So in March I sent in a money order in the amount of $500 then I looked up my payoff amount in April, it was for $566.46. So I sent in that money order. Then in May I received another bill, I called and told them how I had already sent in the pay off amount so my account should be paid off in full. After getting the run around, they told me that I still owed $112. I told them when I purchased the phones I made two separate payments at the store when I purchased the phones. They tried to explain to me that one of those payments was most likely for my Cricket service plan. I explained tot them that it was not, because I always make those payments online and I paid that payment 2 days later. They told me that if I could send them proof of that payment they would close my account. I went into the Cricket store and they gave me a print out of those payments.

I sent them in and a few weeks later I receive a letter saying that they regretted to inform me that the payment was not received and I need to contact the merchant where I purchased the phone. I looked through all of my online bank statements and found that I had paid 3 separate payments to the Cricket store in Jan. So I called the number that I saw had been calling me, which ended up being their bill collection department. I asked to speak to the manager and h. Was really rude. He said that my payment. Was received on April 17, 2014, so I went over my 90 days. I explained to them that the bill says to allow for 7 days for payment to post to the account and that payment was posted on the 7th day. They tried to tell me that since I has went over that 90 days it went into financing and now I needed to pay the additional $1200 for my plan. I told them that the apparently I called the wrong department because the last guy told me if I could provide proof of that $112 payment, he would close my case. He said that he had nothing like that in his notes and that it did not matter. I told him that apparently I had called the wrong department, so I needed to call the financing department and talk to the manager who I was speaking with before, so I could speak with him about the agreement that he had made with me. The guy said he would put his note in the computer, so good luck with that. I tried to call the financing dept to speak with the original person that I was speaking with but they are already closed at 4:00 p.m. AZ time. So I will continue to try to reach this guy, to speak with him about providing them with more proof that I have of making that payment. As of now I have paid these people 1303.33. I will not pay them another dine except for maybe the $20 fee for that first ACH payment that was returned from my bank.