When the internet doesn't seem to be working, please post the outputs of the following commands (to be entered in a 'Terminal', which you can open with 'Ctrl+Alt+T' keys) -
While posting the outputs, please use 'Code' tags. It preserves the output's formatting and makes the post cleaner, compact and more readable. To see a quick 'HowTo' with screenshots, please follow the "Using Code Tags" link in my signature.
sudo lshw -numeric -C network -sanitize
ping -c4 220.127.116.11