Worst experience I've had with booking a room. I p...

Worst experience I've had with booking a room. I put the right dates into booking system and the wrong reservation came through. I called immediately to rectify and they're telling me they won't even change the dates for me. Spoke with a Tom who told me we would be good to change dates or cancel and that I would get a call back later with the options and with no call I called to speak to a manger and Michael told me to pound sand. I'm one day off from their stupid 30 day window from a mistake i didn't make.