My credit card is up to date and I am getting message that my card is declined. When I add the ccv number it doesn’t resolve the problem. I tried to reenter my card, but it won’t allow that.

See If your payment method is declined in the App Store or iTunes Store https://support.apple.com/en-us/HT203005.  If you need additional help, use this support link from the document https://support.apple.com/contact or those posted below.

Also, see these reads pertaining to a related error: 

Payment method declined in iTunes or the App Store ...

Fix 'Your Payment Method Was Declined' Error In App Store

Why do I keep getting a message that my Apple payment ...

Also, can get Apple telephone support  for help in solving your problem using this link https://getsupport.apple.com/?caller=kbase&PGF=PGF63005&category_id=SC0245&symptom_id=23362  Be patient. Sometimes Apple phone support is not available.

or use Apple Support Twitter https://twitter.com/AppleSupport. There may be and hour or so wait.

And here is how to contact iTunes worldwide support via text or chat using this link https://support.apple.com/choose-country-region/itunes After choosing your country, see the heading Tell us how we can help.