Bad service EVER

Disgusted by their Credit card Legal Department I have paid up my credit card that I owed a year ago. Till to this day I have not received a letter stating I paid my debt fully. Their call centre will call everyday to remind me of the payment but now that I paid fully no letter..I tried to call them last year at one of the branches in Bloemfontein to request the letter and guess what I was holding for more than 20 minutes. I was angry and decided not to call again but last week Friday 26th July my attempt went to loss of whole of my airtime and I was on the phone from 09:00 till 12:30 been transferred to wrong department or be put to the correct department to which my call will be taken but dropped off again. Frustration took tall on me but because of the need for letter I kept trying till I got to speak to Bonolo who said she spoke to one of the consulted in the legal department who sounded as if she will be emailing me my request letter before she could drop the phone. Guess WHAT NO LETTER HAVE I RECEIVED. CURRENTLY I'M IN PORT ELIZABETH WALMER FNB BRANCH AND I'M HOLDING FOR CONSULTED TO TAKE MY CALL AND I HAVE BEEN HOLDING FOR 31:26 MUNITES NOW. I'M BEYOND ANGRY. I'M DONE WITH THIS DIRTY SERVICE. THE CONSULTED IN THE BRANCH THEY DON'T EVEN COME OVER TO HEAR WHY THE LONG HOLD SIES. I'M MOVING TO ANOTHER BANK THIS IS FILTHY BANK