Faulty Smart Phone

<p>I bought my Acer Liquid Z220 in Dec 2015 it worked until the 5th month then kept rebooting. I gave it in at Incredible Connection Polokwane the 6th month, they repaired, it came back, the the signal kept switching off, I gave it in on the 7th month, got it back and is still doing the same!!! I live in Tzaneen and its costing me more than the phone driving up and down!!! Can some one please assist to resolve this issue once and for all????</p>