Poor service, billing unneccesarily!

Im not sure why am i still being billed for a home wifi that was cancelled by Vodacom and the router was collected by Ram. My bill should have been reduced by 400-500 as well as being charged for changing my plan but was not informed that this will increase my debit order amount, but instead its more than what i was initially paying. Please advise ASAP as i want my money back. Not sure why this is taking so long, its the second month now and I’ve just recieved my bill and it’s still the same amount.