Honor 9 won't boot up

Hi,

I have problem with my Honor 9...I can't start phone on power button. When I press it nothing happens. When I put phone on charger phone start itself automaticaly, I can see first screen(Honor 9 text) and after that it shut's down, then again start automaticaly etc. Phone is going in boot loop over and over again. I can't do hard reset with combination tasters. Do you have some solution, advice what can I try, and what can be problem.

Note: All of this happens after I dropped my phone on ground.

Thanks in advance....