Extremely unhappy customer

Telkom does not know how to treat their loyal clients. I have had a contract with them for two years and never missed a payment, but I missed just 1 and they took my account to collections, collections then go into your account every two days and when they do not find money, they penalise you for all the times they come into your account. You know if I had missed 2 or 3 payments (debit order) I would understand and I paid the outstanding amount 15 days later and they still penalised me.