Trying to cancel vodacom contract is HARD!!!

Vodacom is ****ming me. I am trying to cancel a vodacom contract which is expiring in June 15, the first consultant I spoke to said the last debit order will be on 30 June 2025, the second consultant said the last debit order will be on 30 July 2025 but I will only be paying for the airtime and not the device. The third consultant said the last debit order date will be 30 July and I will pay the whole instalment!! Clearly no one really knows why we cant cancel our contracts and when the last instalment should be. WHY AM I PAYING FOR JULY WHEN MY CONTRACTS EXPIRES ON 15 JUNE ???? What exactly am I being billed for in July??? NO ONE can provide answers to my questions.