Rain is still debiting my account after cancellation and my sim card has been deactivated

Rain is still debiting my account after cancellation. I had two sim cards with them and my sim cards has been deactivated since July 2021. I want to be refunded. I have cancelled/deactivated my two sim cards and it was to be deactivated on the 1st of August 2021. But to my surprise I was billed a full R729.00 on the 1st of August and I have just been billed R729.00 again on the 25th September 2021. My sims is no longer active and also it does not even appear on my profile anymore to show it has been deactivated. I have tried countless times to get assistance from their contact numbers with no avail. No customer service from them it is like they do not exist. Very frustrated, Please rain stop taking my money and refund me my two payments.