State tax filing

TurboTax indicated a $20 state filing fee. When i went to charge it was $25. Then the application did not credit my billed payment. After 30 minutes on the phone, I was told I should fill out the form, and they would give me a refund. I just got a letter that the refund was denied. What about the $5 difference between what the program stated and what I was billed on the credit card. What about the promise made on the phone?  What about my time? When  they give an expectation, and then deny it without a link for an appeal, it is upsetting.