extremely frustrated

I made a payment of R4020.00 at edgars in wynberg on the 04 March 2015,the following day 05/03/15 I called edgars ***to request a paid up letter as they confirmed the payment is reflecting and is what was owing on the account so the balance is R0.00...I was advised it will take 48hrs to receive that letter. The 6th of March I called them again only to be told that i had been billed R390.00 by the lawyers as my account was handed over and that this amount was billed as part of the monthly fee and it was done after i had paid a balance however a reversal will be requested which will take another 48hrs and thereafter a paid up letter will be sent to me vial email within 48hrs after reversal.....I have been calling edgars up until today 17March and all this has not been processed but instead am now holding for more than 20min since the lady assisting me said she was calling her Line Manager as she could not confirm when exactly this will be done...I am really frustrated as I work in the financial industry and I am pressured to prove this debt has been paid up...please do help