crashing due to limited ram I guess, is a refund possible?

I’ve sent an email asking for such (as I didn’t get a receipt) as my iphone 4s doesn’t seem to be able to handle the game unlike siralim 1, but haven’t gotten a response, so I’m trying the forums instead - is that an option or are people on older devices out of luck (and 4,99€)? Just as I can’t afford a better phone, I also can’t afford throwing away money :frowning:

http://www.imore.com/how-to-get-refund-itunes-app-store

thank you very much umaro!