MTN BAD BAD BAD

Don't want to be mentioned in the same sentence than this people. I took out a Home Internet Contract Pay as you go with them, in the first place they didn't tell me that the internet will not work in the region where i am staying, I paid the amount for the couple of days that was left for the month and the following month in advance. When I receive my router and sim card and can't get anything to work I phoned them just for them to tell me that's not going to work in my area so NO internet was used, so I go in to the MTN shop to take back the router and sim card and to cancel everything (still in the month I received it not even in the next month that was already paid for), they did tell me that I must phone after 24 hours to arrange my refund, when I phoned them they tell me I must first pay another months subscription before they can cancel the contract, my question is WHY on earth must I pay for something that never worked from the start just refund me and cancel everything, needless to say nothing happened, so this month they debited my bank account with a huge amount, I am tired to argue with people that doesn't understand at all, I won't recommend MTN at all to anybody they just take your money and don't do anything from their side to help the customer but when you take out something from them they don't leave you alone, they disgust me.