Will I get a refund for this?

I got the phone Huawei P20 Lite for Christmas and today after 4 days I've plugged in headphones to listen to music as otherwise without any problems when I infected them, the screen went off suddenly. When I turned it on, there were weird white stripes all over the screen. Hard reset, etc. Already tried. His manual from the phone is that I have 3 months warranty and now wanted to ask if I can send it back because of errors and if it is repaired or I get a new one and how long it takes approximately

I would have this repaired for warranty.

Normally you will get it refunded. It was the same with my stereo. But then turn to the manufacturer and not about the shops, etc.

The phone will be repaired for free.