As the packs were purchased with club coins could you please try the following for me?
Firstly could you please force close (the game should not be running at all at this time) the app and then clear the Gun Club 2 data from your device. Then when you reopen the app go to the Club Coins screen and hit the Virtual Goods button. You should then see a list of packs that you have purchased with club coins. Wait until they all say downloaded and then hit the Android Back Button. The packs should unlock!