Can I get my money back if I'll delete my game account?

The game does not allow you to delete the game account, but if you stop playing your castle will eventually disappear from the province and only reappear if you log back in. Purchases for the game, as with most in app purchases, are non refundable unless you have had a problem such as not receiving what you paid for. In that case you will need to contact the game support or your app store to make the refund request.