*****ing our money

This is the THIRD time in 2 weeks that I have requested, been allocated and paid for Exit row seats, I have then (when checking in) found out that I have been allocated in all 3 cases, to the rear of the plane. No apology, explanation and offer to reimburse me. Only after remaining on the phone for over 20 mins each time, was I told that I could apply for a refund. Disgusting is all I can say. Carte Blanche and the relevant authorities should investigate the repetitious advertising of designated seats against a payment, and the non delivery thereof.