Rain want to double charge me for their mistake

I logged a support ticket after having networks issues and poor download speed even though I subscribed to their "Premium 5G". After days of waiting for response I decided to cancel the subscription then few days a support personnel cold with regards to the support ticket a suggested that he send the technicin my home to for optimization and mounting the outdoor unit which I have monitor if my network improves then decided to continue with cancelation or not. Last I recieve this email "Kindly confirm if you would like to cancel your 5G with immediate effect or must we schedule it for the end of the month?

Please also confirm the reason why you would like to cancel your subscription and the collection address for the router/ device." as respond to cancelation ticket to which I responded "I would like to continue with the service and not cancel I was still monitoring to check if my internet connection will improve after the technician came to check my router. " as I had discussed with the other technician and my respond was acknowledged. On monday 1st March when i try to connect to internet using the wifi I was able too when I logged to the rain portal I did not have any device active which my service was cancelled, when I called they told me once a request is made to cancel you can not undo it but I was never told about it and now they debited R1000 from my account and want me to pay another R1000 for new subscription and now I stuck without Internet with my account debit and now taking accountability for this mess