Help

For months now I have a problem with my App Store Account. Even though my credit card is ok I receive the following error messages : “there is a billing problem with a previous purchase. Please update your payment method” or “ your credit card has expired “. At the moment I don’t want to buy anything just to make free updates to previous both applications. I don’t’ understand how I can buy and applications without a problem , but when it comes to updating it I have a payment method issue. Be aware that my credit card will expire in 2014 so this is out of the question that I have an expired credit card. It’s the second time I have encountered this . The first time, after a couple of months it simply solved by itself. I thought it was an error or something like this but now it’s becoming annoying.

I don’t to lose my confidence in Apple so please do something to help me.