Cancellation not done and still being billed.

I cancelled the 5G I had due to connectivity issues at it never worked only a quarter of the month will have little connection. Please refund as I have stopped using your services months back and I did cancel using the app and notified you the reason why so please come and collect your router and sim card but please refund me before you come collect and you can check when I last used your services. Tried to upgrade to your premium it was worse nothing I tried to use get connection so please refund and come get your router. Thank you.