Still no return of my phone and now word

The LCD screen on my Galaxy S5 phone broke. Under the ADH premium warranty, Samsung picked the phone up in October. I received the phone back on November 5th, apparently having been repaired. The screen was now fixed, but was lifting from the device. I reported this back to Samsung ADH on November 6th. They arranged for my phone to be picked up on the 10th of November. I did not hear anything back for some time, and eventually contacted Samsung ADH via email. They then told me that the phone had been repaired, and was under quality control. After more days of not hearing back, I enquired again. I was eventually told that it had failed quality control and had been sent back to the technician. More days went by and I did not hear a thing. After enquiring, I was told that the bracket was damaged and needed to be replaced. I was sent a quote. When I enquired about the quote and how the phone had passed quality control the first time round and this had not been picked up, or why this problem wasn't present before, I was not answered. To this date I still don't have my phone or any answers.