DO NOT GET A CONTRACT LAPTOP

I got a Lenovo laptop on contract 2 months ago from MTN Direct. Laptop was faulty from start and was I called back and was instructed to take the laptop in for assessment by Partseve. Assessment came back as faulty drive and partsever passed a credit. I then called MTN direct again and was then instructed to go into store to get a new laptop. On arrival at store I was told that credit was not showing. We called numerous times and after being passed from pillar to post - MTN Direct, then sales, then after sales, then credits then contracts and back and back and back. camne no where. No body knows what to do ior who to talk to and yet I am still paying for a laptop I no longer have??? I am on the verge of cancelling this stupid contract but being told then I will have to pay the penalty. ALL I WANT IS THIS CREDIT PASSED AND CANCELED SO THAT I CAN GET A NEW LAPTOP ASAP!!!! I have been an MTN customer for more than20 years now and this is by far the most pathetic service ever!