Billing problem - ****ed up system.

Telkom Billing is messing up with my account. I started a new contract in Jan, with agreed debit order date to be last day of the month. They took my account to collections without notifying me. The collections people are debiting anytime they want. I called numerous times and even went to the store to tell them I want them to debit month end cause other days they won’t get money and also Telkom will charge me R200 penalty for missing a debit order. They told me, the reason why my account is on collection is because the Sales team did not activate debi check. They have activated the debi check, I must pay the missed debit order via eft and Telkom customer service will debit last day of the month. Effective 30 April. On the 30th April they didn’t debit , on the 3rd I made a payment and today I woke up with my services suspended. Please fix this. I can’t be going through this every month.