This is was the actual problem at first
Now I booted with Linux Mint (my broken OS is Linux Gnome) and still no internet connection. I need it to repair python and get my OS up and running again. Sadly, I can't connect the lan cable because I moved to the UK three months ago and the router hasn't got the standard lan cable.
After lspci -nn | grep 0280
this is what I get:
03:00.0 Network controller [0280]: Broadcom Corporation BCM43228 802.11a/b/g/n [14e4:4359]
linux-headers
and thebcmwl-kernel-source
to get the wifi working on the broadcom wifi card. Try to get internet connection like smartphone tethering through USB , 3G, 4G... or use a wifi usb supportd by your kernel version – GAD3R May 09 '17 at 20:04