Oppo — functions errors

There is a problem in oppo f5, it does not allow users to use any other launcher than just system launcher and the face detection lock does not work either. We pay 20k bucks just to use the piece of error? Don't you people have any responsibility to keep your customer happy after charging them their one months salary just to buy your phone with high hopes

Please fix the problem as soon as possible otherwise don't make us pay 20k for your errors.

I don't even think you people ever check this section.