Sandbox account? Can't buy plat

[Guitarlon]

I live in the UK. When I tried buying 30 plat in-game for £2.99 - it just said "this is not a test user account, please create a sandbox account" help? I want to buy the first 4 campaign bundle! (iphone 3G)

[Futumsh]

See the sticky in this forum for the workaround, it's due to your device being jailbroken.