In XXXX 2014, we bought a TV from Conns XXXX with an offer of 0 % interest if we paid in 24 payments ( months ). We divided the total amount including insurance into equal payments which we automatically paid off in 6months ( XXXX 2014 ). A year later, we received a non-dated letter offering us an increase in credit line because of our " positive payment history ''. At the same time the letter shows a current balance of # XXXX. So we called the company to find out what was going on. The customer service agent said to ignore it if it did not have an account number. It was a way for them to market their products. Our deal with them was over a year ago. However, right after our call, their collection department started calling us and leaving urgent messages. We called again and they said we owe them {$24.00} insurance. We said we do not have the paperwork that is already old and for us paid off. We asked for a written correspondence with explanation of this amount. It has been 3 weeks since we asked for this and nothing came in the mail. 
Starting on XXXX XXXX their collection Department put our home number and a mobile phone on a 2 hour robocalls and we have been receiving those calls from about XXXX in the XXXX till XXXX in the XXXX. 
We attempted to block the numbers but they kept changing numbers. We are now at XXXX local numbers and XXXX XXXX number. 
We appreciate any help you can provide and advice for the next step to stop this merchant from harassing us. 
Respectfully.