Paid up letter

My edgars acc was handed over to lawyers last year and the lawyers contacted me offering me a settlement on the acc,i made payment on the 25th of july 2015 and in august i contacted the lawyers to confirm if they had recieved payment and they said to me YES and said the acc was closed iv requested for a paid up letter since last year until today i havent recieved it,i am underdebt counsiling and hav finished paying all my acc and the debt cousellor needs the paid up letter from edgrars to issue me a clearence certificate,iv call the lawyers and they told me that they are waiting for edcon to give them the letter so they can forward it to me, ive went to the store and even called the call center and they both tellme the same thing \ they cant find me or the account on thier system"and when ever i call the lawyers they always tell me that on thier system it shows them that iv paid up the acc. Dont know what else to do...."""