They don't cancel they keep on deducting

I canceled and paid for the service i didn't use and yet you are still debiting . The router was collected last month, last month everything was disconnected before they collected the router, i don't know why I'm being billed for the service i didn't use . Your consultant are not helping me I've been put on hold for 40 minutes the guy told me that he is resolving the matter . I want my money back please assist. Please reverse my money back