MTN's admin is poor and their call agents are unprofessional

I want a refund for the additional charges that came with you debiting my account more than once. I have been a loyal paying customer of mtn for years. The past month, you failed to debit my account and instead of calling me the account holder paying, you called my very old dad and threatened to block his number for a mistake you did. Then your call agents doesn't even have the decency to apologize for this, and simply thinks running another immediate payment will solve the issue. Why am I paying for your mistakes??