SECOND TIME PROBLEMS WITH NEW DEVICE

I am mental exhausted of dealing with you guys. You create so much unneed stress in one's life and honestly don't care about your customers as long as you make your money. I bough a phone from you guys on July 8th. By JULY 19th it stopped working and gave me issues. I was forced to book it in for repairs. Only for them to send it back after 7days and say nothing is wrong. It's now 2 weeks later and I'm back in the same boat with the phone doing the same thing. This is clearly a faulty device but you will rather send me back and forth wasting my time and money then just take back the device which is clearly problematic. I have called your repair center and no one can tell me anything all I am being told is to rebook the device. What was the point of buying a New phone for is to give me more problems than my 3 year old one. This is unacceptable. I need some with authority to me please. This is an infringement of my consumer rights and I won't accept it.