Telkom incompetence

I took a home fibre contract. I selected a debit date of 15th on my application. Telkom without my authority started debiting me on the last day of the month. I now have a problem each month with them disconnecting my fibre because of an incorrect debit date. I tried changing my debit date which was a nightmare. It's always extra fees and charges for their errors. This is so frustrating I'm seriously considering changing my service provider.