2 and half months waiting for answer

Been struggling for 2 and a half months over a faulty phone that was bought. Promise after promise to call and keep updated. I am the one constantly calling and visiting store for updates. Everytime they can not give me an answer. Area manager is also involved but just talks all stories but no solution. Gives me bull about how they have to wait for mtn for an answer. I DID NOT BUY THE PHONE FROM MTN!!! I do not see how this is my problem. They refuse to give a refund. Very frustrated and disappointed. When this is finally over i will be closing my account. Never recommend them ever again.