BAD SERVICE WITH REGARDS TO BILLING AND UPGRADE

I have been a loyal Telkom customer for 2 years now. Since i took out my first contract 2 years ago, Telkom has never debited my account for the monthly premiums, i always had to make EFT payments and always paid more than the invoice amount due was, i have even been to Telkom twice to rectify this matter and nothing happened, i still paid my account monthly via EFT. 3 weeks ago me and my wife decided to go and see what phones and specials they have seeing as we were due for an upgrade soon, we then decided which phones we wanted and then proceeded with the upgrade process, just then to be told that we can't get the upgrades due to the debit orders that never went off the account. They then said they never received the installment from us in August that we paid in the amount of R 330, we then got all our bank statements and went to the branch again to show them the evidence, they then stated they never received the payment and we had to sort it out with FNB. I then went to FNB and until now they are advising me that payment has gone through to Telkom and Telkom denies this all the way. I am still awaiting a final report from FNB. When i went to Telkom again, they said all we need to pay is R 305.50 then we can get our new phones. I paid the amount and sent through a proof of payment to the consultant that was assisting me. He said it would take up to 2 days for the credit department to capture this payment, so i waited and went in again this past Saturday. Then the guy said we can't have our phones until we pay the balance on the account which is R 261.60 and that Telkom tried to debit the premium in July 2017 and it was returned, i checked my bank statements, no debit order was returned and i was also not charged for the returned debit. Now they say this outstanding amount is what they are charging me. Jarred at the Bayside branch that assisted me said he would personally give me a call back yesterday advising me on my situation and i am still awaiting his call. What useless service especially for a loyal customer of 2 years...DON'T EVER USE TELKOM