Match.com

I set up a subscription to match.com app on my IPhone. Everything works fine with the app on my iPhone, however I am denied purchasing “boosts” via my credit card on the site. All other app sites accept my purchases on my iPhone but match.com. When I attempted to make a purchase on match.com while using my iPhone, I received a message saying I must contact apple.com/support/iTunes to correct the problem. Please inform what I need to do. Thank you.