Paying Off Credit Card

I am disappointed at how hard it is to pay off a Wings FCU credit card with a non-Wings FCU account.  I have been trying to pay off an account for several years and just recently wanted to change the account the automatic withdrawl was taken out of.  Four months later and with four months of late charges, the issue has still not been resolved.  Furthermore, even though there has been fax, email and telephone calls addressing the issue, Wings still is trying to withdrawl the money from the old account which has been closed.  I would not get a credit card from this company.  They are impossible to deal with.