To solve this problem is nothing else works first go to the widgets at the end of your apps list and choose the power control widget and put it on your main screen. Once there check to see if the circling arrows sign that looks similar to the recycling sign is checked on, this controls your background data, if it isn't on check it on. If it is on and google play store still says enable background data then go to settings> apps> Google play store> then hit force stop. After doing so re-open Google play store and it should be working again.
Works perfecly for mee bro thnx