MTN are just ******** and ***** your money

At the end of August I took out a contract by MTN for a router. They delivered it in September but I changed my mind and didn't want the router anymore, so I returned it to the store the same day it was delivered. The store gave me a IRMS number which I had to contact the online department so that they can cancel it on their side. I contacted them the next day and they logged the cancellation in the Mid of September. Note the router and everything was returned to their MTN store. They had the audacity to still debit my account for 2 months for a router which I don't have in my possession just because the router did not make it back to their warehouse. How do they make their problem the customers problem. I returned the device in their cooling off period(which is only 7 days after delivery has taken place), but they only logged the cancellation in October. Now you tell me how is that even possible They literally charged me for a router which was by their MTN store since September. I've contacted them numerous times with no help. They are just a **** and rob you from your money. Don't ever take a contract out by MTN