Telkoms account department is very bad.

I regret taking another contract with Telkom. After using them for more than 24 months on Data contract, I decided to add an A33 for 24 months by the end of January 2023. My debits were always on agreement as before to go off on the 5th of every month. The first debit that they tried after the new contract failed and not because there was not enough money in the account but due to their problem. Then then billed me for that month and the next coming month. That debit bounced because it was not as per our agreement so there wouldn't be a combined debit for two full months. However, I called and asked for clarity. The call center person could not understand too. I decided to immediately pay that total. Today in May, they send me another bill claiming it to be for April which had already been paid. Telkom is very useless, if there's a way to cancel their contracts, I will go and do the cancelation.