I'm unable to purchase chips for Casino. Does anyone have a phone number where I can talk to a "live" person?

There isn't a number for iTunes Support, and all the people on these forums are 'live' people.

What happens when you try to buy them, does the 'buy' button not work, do you get any error messages ... ?

If you are getting a message to contact iTunes Support then you can do so via this link and ask them why the message is appearing (we won't know why) : http://www.apple.com/support/itunes/contact/ - click on Contact iTunes Store Support on the right-hand side of the page, then Purchases, Billing & Redemption

If it's a different problem ... ?

It's pathetic that Apple doesn't have phone or at least live chat support for iTunes.

Also having the same problem with clash of clans