*****ulent debit order

We recently transferred our 3 DSTV decoders from my husbands name to my name and the debit order changed from his account to my account. After the transfer date my husbands account continued to be debited in late March and April by multichoice (when I contacted them to query the debit order they said there was an error and that an old smartcard had been erronesouly reactivated after the transfer of ownership had occurred. It is very worrying that these kind of errors occur - or is it perhaps deliberate *****? I am awaiting feedback from multichoice. I certainly hope they refund us but really it is just unaccetable that something like this can happen.