Poor service and workmanship

In Dec '19 I sent my phone in to repair an issue with the screen burning images into it. I did this in December, as that is my holiday time, I don't have a spare phone and I need my phone to work. At the time the phone's back cover was cracked, but that wasn't the issue. My phone went in on the 12th of Dec to Cornubia Mall and was only sent back on 8 Jan 2020. During this time there was a delay as I was meant to pay for the back cover to be replaced(which was not what I asked for but I was told that Huawei doesn't return phones only partially repaired). I was never told about the payment until I followed up for the umpteenth time. At this point there were a number of agents who promised callbacks but never delivered. Then there was another delay as Cornubia was waiting for the correct colour of back cover, which again, I was never informed about until I phoned the call centre. I instructed them to replace the cover with a black one instead of blue. On every single phone call, I made sure everyone I spoke to knew that the main problem was that the screen was burning images into it, and that the back cover was not the issue. I was assured by Huawei call centre and Cornubia that the screen issue would be resolved. On receiving my phone in Jan, after 2 days I realised that the screen issue had not been resolved and when I called Huawei, they said there was nothing they could do for me, unless I take the phone in again, which I cannot afford as I need my phone for work. Now I have noticed that the cover which was replaced has started pulling apart from the phone. For this issue to be resolved, I urge Huawei to give me a "rental" phone that I can use while my phone goes BACK in, and that the data needed (or at least the cost of it) be reimbursed for the numerous apps that need to be downloaded AGAIN if my phone is wiped again. ***