paid up letter

hi, I had a credit card with woolwoths of which I couldn't pay on time and was handed over to mbd then they called me to arrange the payment terms of which were affordable to me...I managed to pay the full amount and requested for the settlement/paid up letter of which I never got and Woolworths has handed me over to another attorneys, when I call MBD they just become rude and hang up on me, sent an email to their complaints department without any success and also to *** still without any success and now I am getting frustrated dealing with Woolworths and their attorneys for something I paid.