Wifi network not found

Hello! I need some help with my Huawei p8 lite.

So, basically a satisfying phone. Everything worked when I got it, of course I had wifi but...after two weeks or so, it refused to connect with any kind of wifi, no matter if the one if our house or at a random starbucks.
After that it became weirder, sometimes just no network at all appeared and by now my phone isn't able to find a single network, no matter what I try. And now I tried to reset my phone but surprise! No network is to be seen once again.

I really need help with that! It can't be that I just can't connect to the wifi! But it shows no single network, and that after everything worked perfectly!

I hope someone can help me. Thanks in advance!