Capital One I have a Capital One Credit card that is supposed to be a no annual fee charge and they are charging me. Internet

I have had a Capital one credit and it was converted to a no annual fee card.  Now Capital One is refusing to give me a losy $39 credit for the annual fee.  I never paid this fee because they always waived it.  I am an excellent customer and always pay my bills on time.  I have other credit cards with higher limits and they don't charge any fees.  For a week I have been arguing with them and they are refusing to give me this lousy $39 credit.  Stay away from them people.  Their customer service is not aware of what's going on.  They don't even know the correct credit card you have.  It's not even the $39 so much.  It's the point of the way they treat their customers.  They don't mind loosing customers over a lousy fee.  I still want my $39 credited.  This credit card company has poor customer service and should be taken to task over it.