Paid up letter

I was contacted by Home choice and told that i have areas, I decided to settle the amount (6500)I owed them in three instalments on the 02-04-07 December 2015. Thereafter I requested them to provide me with the paid up letter, proof of payment was forwarded to them on the same date. A week later when I tried to follow up, I was told that my account is closed and has been handed to S Johns and Associates. I gave S Johns and Associates a call and spoke to Bervely Shabangu who said she cant view anything from her side I must contact home choice as she cannot assist me. On contacting Home choice I was told that my matter is with DMC lawyers, whom I contacted and they said there is nothing reflecting on their side I must call home choice. On the 12/12/2015 I sent an E-mail to [Email Removed] attaching proof of payment and requesting paid up letter, but nothing came forth. This process has been very frustrating as I find it difficult to put the matter at rest.