Terrible repair service, I had to send my Huawei 4...

Terrible repair service, I had to send my Huawei 4x phone because I have a microphone problem, to be told every time there is no problem. I'm just waiting to finish my contract and more Huawei for me.
And there a second bad experience with a new Samsung tablet sent for repair (the wifi is constantly falling) the UBreakIFix technician saw the problem himself and sent for repair. Again, they do nothing and return the tablet saying no problem.

My luck is that I bought it from Costco and I could return the Samsung tablet without any problem and buy another one. I am lucky to have had an alternative because this repair service is really bad.