Failure to cancel account and theft debit order

My wife called Rain in April to cancel our monthly subscription as we were leaving the country. She also arranged collection for the 5G router at the beginning of June. It was agreed the last debit order would be 1 June. Since then, Rain has debited our account on 1 July and there is no trace of cancellation on the online account and it states the next debit order is 1 August! This is theft! We need our R699 returned to us for 1 July and the account cancelled.