Telkom paid up letter

I had an account with Telkom which it didn't turned out well as I was not agreeing with the bill charged to me because I was not using their SIM card. This bad experience left me in bad credit record with transunion. Last year 29 October 2018 I end up settling the amount claimed, it was two bills against two SIM card which one was R1557.15 and another R2147.08. same day settled i requested them to update my credit status in transunion. On the 20th of November when make the followed up I was told I didn't not closed the account I am still owing R57.15 even though the line were suspended. Okay i paid the R57.15 and send the email same day requesting the to close the account and to forward me the paid up letter which I never received till now. Monday the 8th April 2019, I called asking for my paid up letter . I was told it will be send after 7 days. On friday the 12th April 2019 I called again to make a follow up on my paid up letter, I was told I owe R3.00 that arises after I paid the R57.15 and same day Friday, I paid into their account R60.00 end up even requesting for my paid up letter. Today is Monday the 15th of April I just made up the follow up I was told I will receive my paid up letter on the 23rd of April. I have been requesting for my paid up letter from Telkom for 6month now. Can someone kindly help, because it looks like they are drugging this matter deliberately.