POOR SERVICE AND REPAIRS

My LG G3 continuously reboot by itself so i booked it in for repairs at MTN Southgate, phone came back from repairs supposedly to be fixed but it was not, i then booked the phone back in for repairs at MTN Hyde Park.The phone came back from repairs after about 3 weeks also suppose to be repaired but it was not, it actually came back with additional chips and scratches. MTN Hyde Park then just told me that it must then be booked back in for a third time. I am in contract with MTN and my phone is still under warranty this is unacceptable and the worse service, my experience with their staff came across as *********** and careless. MTN Hyde Park employee actually suggested to run across to a vodacom store agent to try and have my phone fixed there. I want my ****ing phone fixed immediately and in working condition as i'm still under warranty. Your *********** repairs center dispatched a phone send in for repairs 3 times without actually fixing it: JOB #*** ALLENDALE