Cancellation of Club Daddy is not adhered to

Their contract terms are not adhered to. If you join their "club daddy" it costs R99 a month and apparently you can cancel with 30 days notice. In the contract it is stated fees are payable in ADVANCE. so I send my notice of cancellation on the 31 March. Fees deducted on 1 April. I understand contract ends on 30 April. 1 May fees are deducted again??? On querying this below is their reply. You have cancelled on the 31.03.2022, with the first day being the 01.04.2022 the 30th day being the 30.04.2022. The 30.04.2022 was your last debit, giving you access up until the 30.05.2022.

That is not 30 days notice.