Saw one price but charged a different price

I clicked through fidelity discount link and paid my premium ordered. I saw I got 30% discount on federal filing and got to the confirmation screen after payment. Later received an email that showed I was charged a full price. Submitted two refund cases but denied within 20 mins. Call their 800 number and went to supervisor level but got disconnected. There is no customer support email I can send my screenshots and no one helped with refunding the 30% difference. It seemed to me a system glitch but turbo tax just didn’t help at all. Any thoughts ? Thanks!

posted