Rain - Huge disappointment!

I am very disappointed with this provider.

1) I received the router and my service was activated at the beginning of Feb'22. 2) I used rain for the entire month of February and have also paid for February. The router had full signal but the internet was extremely limited for the entire month of February. I had no choice but to cancel the rain service. 3) During the first week of March I cancelled the rain services and provided them with an address for them to come and collect the router. 4) With 3 telephonic discussions I had with Rain officials during March, it was indicated that that the router will be collected and that my services was cancelled with rain. 5) Rain still have not collected the router. 6) I received an invoice from Rain stating that I have an outstanding amount of R642.21 to be paid for March. This is not right. It was confirmed with a Rain official that I will only be paying pro rata for March since I cancelled my rain services at the beginning of March.