You have my sympathies …
Priceline acted as your agent and withdrew $1100 from your credit card. Subsequently they informed you by both telephone and email that your literary is different than they initially disclosed. No action required on your part other than to confirm your reservation with the airline – a good practice in any event. When you attempt to confirm the reservation you learn it has been canceled. Is that about right?
In my book that makes Priceline responsible to set things right. Telling you to get lost is not an acceptable option. Contact Priceline again and attempt to escalate the issue. Did they credit the $1100 back to you? If not, then clearly the ball is in Priceline's court.
If your local newspaper or television station has a consumer affairs person I'm sure they would be very interested in your story.
Good luck and keep us informed.