Cant buy Infinite Flight Pro

I am having difficulties trying to buy Infinite Flight Pro on my Samsung J7. Whenever i click to buy it, all that pops up is “The item you have requested is not available for purchase”. This does not only happen to Infinite Flight Pro but also to other inapp purchases in the game. I have tried clearing google play cache multiple of times but it still doesnt work. Could you let me know how do i fix this problem? Thanks

Try reinstalling the app and see if it helps or restart your device. Let us know if it works!

Hong Kong, im pretty sure it should work as i have previously purchased the Live version before

Unfortunately we do not offer purchasing in China and a select few other locations due to a high level of fraudulent activity. We apologize for any inconvenience.