conn's Conn's credit corp harassment Mesquite , Texas

In March 6 2011 Sunday night I walked in to store #34 to looked at wahers8 & Electric driers I saw the last set on clearance. Sales person open an account to put on hold. Conn's delivered appliances on Saturday March 12 2011. I went back to the store on March 13 2011 to pay off the total amount. I pay off the total amount under invoice # because the credit account wasn't in the system yet. That's what I was told by clerk. Payments will kicked in on April 6 2011. The clerk told it will take a few days ti clear off the system not to worried about payments if credit people call to tell them to call the store. Conn's credit corporation harassing about payments. I called uConn's # 34 to resolved this problem. They said they would take care of it. Conn's credit corp keeps harassing. On April 25 2011 @ 11:50am 1-877-404-2431 I faxed receipt proved of purchased & a letter to make corrections of clerical error by cashier. After the letter it quit for 8 months in December they start harassing again about due past payment. They are ripped offs.