MTN very bad service and no communication s****s!

MTN is the worst service provider. ive got a contract with them and i did an upgrade in july.got a new samsung A6 plus.after 2 months it stopped working.i took into mtn on the 19Oct..they sent in for repair but fone was still under warranty so they said they'd replace it with new fone.to this day im still waiting. the new fone has travelled all over and nobody at samsung or mtn seems to know where the fone is.ive been foning everyday trying to track my fone but everyone comes up with a different story. so at this point, i dont know where my new fone is. nobody bothers to fone me and apologize for the long wait or even tell me whats going for what. its been a month and a half and still no fone.i contacted supervisor at mtn northern cape and she wasnt even aware of the problem so she has been trying to track fone. she told me i could collect fone by her thursday 29 Nov at 17:00 when i foned them friday 30 Nov morning they tell me fone still hasnt arrived.and in the meantime i must pay my account with mtn for a fone i dont even have.ive made hundreds of calls and still no fone. mtn is pathetic. this is not my job to track my fone, i pay mtn for a service which im not even getting!!!!!!