Dud P20 Pro not being replaced

I convinced my wife to switch over to the P20 Pro from Apple.

2 month in on her P20 Pro, the phone just froze and it would not come back on again.

We then had to take the phone to Melrose Arch for repairs. A few days later I phoned the customer support number to hear what is happening with my phone. I was told that the phone has been repaired and that I can go and collect it. I never received any communication from them as I was told I would.

Fine.... Yesterday we went to collect the phone. First of all, all my wife's data was gone, so now we had to setup and copy everything from the old Iphone that was still going strong. Secondly they told us they had to replace the mother board, so now we have a 2nd hand new device.... That night when she tried to take a photo, the photo app on the phone just froze and we get a black screen. I did a factory reset, with no luck. And the camera just freezes every time you open it

I phoned customer care again this morning and they told me that the phone needs to go back to Melrose Arch again. I THINK THIS IS TERRIBLE. I expect a brand new phone. This ons is clearly a dud and needs to be replaced. Huawei is going to lose cliental. My wife and I are already thinking of going back to Apple even though I would love to keep using Huawei, but I can't struggle like this with a brand new phone.