On XXXX/XXXX/15 I sent Valarity LLC a certified letter stating I was aware I owed a past due balance of {$1600.00} but I am on XXXX I do currently have a financial assistance agreement with XXXX Valarity as their collection agency. I asked Valarity not to call me anymore but to send communications via mail. They received the certified letter on XXXX/XXXX/15. Since then, Valarity continues to call XXXX a day. I recognize the phone number, so I do not answer the calls. I was advised not to speak to them.