HONOR 400 Lite cellphone screen factory defects

Wife and I bought HONOR, after being so happy with Vivo. I have HONOR 400 Lite, which is a good instrument. Problem is I've now 3 times tried replacing the screen protector, and last time was at Telkom where I renewed my contract. Last 2 occasions Telkom said this specific handset has a problem with the screen (not just mine but all), where there's a curvature on right hand side, and NO screen protector will fit properly. It leaves a greyish patch all on the one side, and you can see the protector doesn't "hold" there. I've done 3 replacements, no joy. It's not the end of the world, but frustrating, and makes phone look untidy and poor condition. I suggest avoid the HONOR 400 Lite. Not sure about other models.