Barclays PLC Credit Card Complaint

Barclays PLC Credit card department,

Advertising and marketing Colorado

I requested a Frontier Airlines credit card from Barclays with the promise of a - mile frequent flyer mile credit from Frontier. I paid the annual fee and met the requirements 5 months ago but STIIL have not received the mile credit from Frontier. I have contacted Barclays several times to get this resolved but keep getting the runaround. Barclays seems to blame Frontier but I believe it is their obligation to make sure their partners deliver on what Barclays promised to get me to take their card. From online comments others are being mistreated over this also and many are calling this an outright scam. This behavior is beneath Barclays and Frontier. I am requesting an immediate credit of my - miles or a return/credit from Barclays of my annual fee and cancellation of the card.