Phone not repaired

Cellphone's camera stopped working. Phone was sent in for repairs. After a month when the phone came back, the camera worked for 2 days. The phone was again sent in on April 13th for repairs. When we got the phone back on June 30th the camera didn't work. Now the phone must be send back a third time. I get no answers from MTN about the phone. They are sending emails around and nobody knows what is going on. I don't get answers.