Netstar *****s money from your account after you cancel

On 01/01/2023 at 17:20 I sent an email to Netstar (***) to cancel my contract, as I sold my vehicle. On 03/01/2023 at 09:49 Netstar rep**** and asked for my ID number, which I sent to them on the same day at 15:52. On 04/01/2023 at 7:22 I received the following message: "Your request has been forwarded to our Retentions department and you can follow up on your query by calling them on *** or ***" I received a reference number with this email. On the same day, 04/01/2023 at 12:08 I forwarded the correspondence to ***. On 08/02/2023 at 2:50 , yes that is more than a month after my last email was sent, Netstar rep**** with the following: In response to your request , Please note that vehicle registration *** is contracted to a 36-month rental agreement. The tracking device was installed on 2020-07-09 and the end of the agreement term is on 2023-07-09 The settlement payable is R 209.98 The total balance to pay including the settlement, one month’s premium and the outstanding balance is R 317,46 Kindly advise if we may proceed with cancellation ? On 09/02/2023 at 8:11 I rep**** with the following: Thank you for taking more than a month to get back to me. Seeing as I gave notice in January, you cannot take another month’s installment from me. I agree to the settlement amount of R 209.98, but I WILL NOT pay for another month’s installment. Hoping to hear from you before another month goes by. I never heard from them again. Yesterday they stole another installment from my account. I am not hopeful that they will get back to me.