Update payment details

Received SMS from Vodacom on the 2/12 stating my bank rejected my debit order . My credit card has been re issued , called ********** as per SMS to update payment details only to be told it's Sunday we cannot assist but will get the collections dept to call you on Monday whilst screaming and singing going on in the background.. Waited till about 14.00pm no call , called back and still cannot assist and promised the collections dept will call me back. 4 calls to Vodacom just to update payment details and still no joy!!!!!