Poorest, worst service

I have had nothing but the worst experience with Vodacom Technical Centre. This year alone I have booked my phone for more than 5 times for the same proble(BLANK SCREEN). The last time it worked for a day or 2 and the problem started again. I went to Vodashop thrice to book it in, they were offline. Ohk, now the phone is in for repairs. To my surprise, I get a call for a R1500 quote to fix!! Apparently the screen is broken!! How did the screen broke if it only worked for a day?? I called the Fourways repair Centre and spoke to Dumi Dyosini whom I was told that he's a manager. He promised to call me in 15 minutes and over 24 hours, I am still waiting for his call. I DO NOT WANT THIS PHONE BACK!! I NEED A NEW REPLACED PHONE!! This is totally unacceptable!!