Unit store question

I am trying to buy the unit daily card, but game says I have insufficient balance. I go to google play store and it shows I have plenty, how or where to get this resolved.
0
Comments
However I don't think this is even related to why the unit store screen says. " There are no offers currently available..
It's been there for almost 2 weeks..
But i didn't change phone too..
So how do i solve this?