Poor customer service

My mobile account was suddenly blocked due to Telkom failing to collect monthly premium. This fault is on Telkom side as my bank account provided to Telkom has a positive and sufficient balance. Some how Telkom managed to debit the outstanding premium balance a day before the account was blocked. However my account still remains blocked even though it was Telkom billing error which put me into this position. Very poor customer service. Will not be adding any product from Telkom at the end of my current contract.