The worst place to take out any contract is Telkom, always billing issues

i am so tired of having billing issues with Telkom, since i started my contract with them every 3 months i have issues where they tell me i am in arrears when i pay them every month. I asked to change the debit order date but they say it can only be either the 30th of the month or the 15th of the month, it cannot be the 1st of the month. So i asked if i can do a manual payment and then they must cancel the debit order, they said they cant cancel the debit order but if i pay on the 1st of the month then it will reflect as paid on their side by the 7th so they will not debit my account, they try to debit my account every month regardless if i make a payment or not. Then the best part is if the debit doesnt go through, everytime it doesn't go through they add R202 to your bill for the debit not going through, when it already costs you at your bank for them trying to debit you now you must pay them R202 as well. Which there was no mention of in my contract when i signed up, and none of my paper work shows that R202 fee. Everytime i have a billing issue they cut my services and say that i must pay it in order for them to switch it back on , i can then dispute it later and they will refund me. i have had 3 instinces so far and at the moment i am now fighting with them again , where they debited my account on the 30th Of June , yet they sending me 3 messages every night saying that i am in arrears and that my services will be interrupted, when i phone they say that its not reflecting on their side as yet, 9 days later, i must send them proof of the debit order going through. I will never ever take any contracts through them again and i cannot wait until my contracts expire so that i can be done with them. i will never refer anyone to them either.