Connection issues

The hearthstone app won’t connect to my mobile network . I could get as far as trying for a match but, it would boot me back to the main menu with a measage I have no wifi.

It worked normal with wifi but I don’t have access to it all the time. I tried rebooting my phone , turning my data on/off clearing the apps cache. Then I tried uninstalling/reinstalling but now the app can’t download any updates, it just tells me to check my connection.

please help me.