Bad service from MTN

I did an upgrade with MTN Kenilworth in March this year when the consultant hammer me to take the OPPO double deal, when i asked for the Samsung double deal saying that it will work with my other Samsung devices at home only to find out it does not. I returned the OPPO phones the following day & explained to them that it does not work as promised. They said that they will do the change for me and during that time I already paid for the early upgrade. I waited 2 months for them to sort out the mess & only received the new phones in May. Now they still charge me for an early upgrade when during the 2 months I was using my old phone. They lie to the customers when they say sign the debit order form & that is only for them to do the upgrade. They will change the amount to zero they don't. The worst thing it's a DebiCharge on your account and you can't even ask your bank to reverse those debits another thing they do with out you knowing about it. I can't wait for my contract to end with MTN & I will never deal with them again. I hope other people will learn from my experience with them, better not to deal with MTN. YOUR SERVICE SUCK MTN !!!!!!