sony complaint

Good day , i bought a sony experia xa1 from the Hi store at gateway ive only ever had problems from day 1 basically with the phone the screen keeps on going and because of the situation when you guys have had my phone in for repairs ive lost 2 job opportunities as i had no phone , ive delt with your rep wesley and now this is the fourth time this is happened since may this year which is causing me huge problems cause now my boss who lives in america cant get hold of me , i was promised the last time it was booked in that if this happens again that ill get a full refund . sadly ive gotten to the stage that i have no faith in sony whats so ever i feel like posting this on fb and all my social media sites . i feel the level of service that ive recieved is digusting cause your rep said he would call me back and i recieved nothing . if you can kindly reply to my email *** as my no. is not working