Purchased Sandbox mode for Bad Piggies on My Nexus7, how can I get it on my Nexus 4?

[promanex]

When I go to it in the game on the phone, the play store tells me I already own it and then the game just says there was an error. I tried contacting Rovio but I have had no reply from 3 emails

 

[PvilleComp]

If you used the same Gmail account on both devices it should let you re-download it.