Pentagon FCU Credit Card Complaint

Pentagon FCU Credit card department,

Billing disputes Pennsylvania

I signed for an upgrade to a 6 cylinder car from - - for an additional $140.00, but I did not get a 6 cylinder car. They gave a 4 cylinder Corolla. I asked - for a credit to my credit card, but they refused. When I complained to Penfed Visa, my credit card company, they refused to give me a credit without a credit memo from -.