Email google about this issue.
I'm having this issue with all my Android Devices....this is apparently a problem with google. I've been in contact with them and they said their were issues with teh conversion to Google Play. I've been dealing with this for 2 weeks and have access to free apps, but I can't buy any. I've been forced to purchase apps from the Amazon Appstore. Google apparently doesn't want my money....I've been sending emails to google and the developers of the apps I purchased (Scrubs and Cut the Rope: Experiments) and have had literally NO correspondence from google or the the developers. This sucks, as I just got my Prime and Picked up a Used A100, now Google is screwing me....Just some bad news...considering that it's been 2 weeks since this issue cropped up for me and the fact that Google (and it appears the developers) are ignoring my emails, I'm going to assume two things, Google doesn't care, suggesting you start a new google account and re-buying your apps, or it's a known issue and they just don't want to deal with us right now....I just want a straight answer....It could be months before this is fixed....I recommend emailing google ASAP.