Frontier Airlines Review

I was to fly from salt lake to Denver then to mexico, but the plane couldn't get out of denver, so they put us on a different airline.  First they made a mistake on my ticket and I had to rush around the airport trying to get a ticket. Then they sent my luggage to a different place than what they were suppose to so I did't receive my luggage for two days after I got to mexico.  I had nothing.  Then when I finally got my luggage many items were missing, very expensive items.  Needless to say I had a horrible vacation.