MTN Failure to respect the client

NEVER do ANY over the phone upgrades or changes to a contract in whatsoever format. After changing and authorising a confusing Debit order Mandate, services are suspended because of "nonpayment" - but it is because MTN cannot get their admin and 'systems' in order. Some weak excuse of only allowed to make one change per month to an account. Just an absolute pain to deal with MTN on EVERY level.