I was a loyal customer for years and never missed a payment, either. Then I bought some software that didn't work. I returned it to the vendor, who refused it. I refused to pay for it and cited three pages of the software's and vendor's failings to Advanta. Their response was that I had to find other dissatisfied customers before they would credit my account. That is impossible. Do you think the vendor is going to give me a list of his dissatisfied customers?
I paid the bill and learned to live with the software, which still sucks. Advanta charged me interest and a late fee for not paying for the software until the next month. I paid that, too.
Months later I cancelled a monthly service 10 days before the end of the credit card cycle--plenty of time for the service to reverse its monthly charges. An Advanta rep told me on the phone they had talked to the service and the service agreed to credit back my account the following month. They subsequently refused to do that and Advanta refused to credit back my account, too, despite what Advanta told me. I didn't pay that bill, figuring the service would come to their senses, but when they didn't, I was into another billing cycle with more interest and late fees. Advanta refused to reverse either. I paid the bill and closed the account, vowing never again to do business with Advanta.
My conclusion is that they are vendor oriented, not consumer oriented. They have arbitrary rules that do not fit reality. They are inflexible. I'm not. I now have other credit cards. I suggest anyone who reads this take this to heart. You won't know just how bad these people are until you really need them. In a word, Advanta is AWFUL.