VODACOM - USELESS CUSTOMER CARE

I have recently moved to Ghana and I have a contract with Vodacom and its imperative I keep the number as I get my OTP's from them to do my daily banking in SA. But Vodacom refuses to debit my account (as was the agreement) after numerous requests but rather prefer to suspend my account and inconvenience me and I have to run around to make the payment by asking other people (as I don't get OTP's) , to settle it for me . this is the 2 nd time its happening in 3 months and last time I made a request for the debits to still go off my account but they have suspended my account again ,I cant get OTP'S AGAIN , What a joke they have for a customer service department . Breaking their own TERMS AND CONDITIONS OF THEIR CONTRACT!!!! SURELY THIS RENDERS THE AGREEMENT NULL AND VOID?