Travel to Tenerife for the Festive Season !

I have a booking with Easyjet for 4 tickets (3 adults 1 child) to Tenerife departing 20th December @ 07.00 from London Gatwick and returning 3rd January 2013 at 23.20, also included is 2 x 20kg of hold baggage each way @ £72.00 and airport parking @ 82.00. Due to unforseen circumstances my family and I are unable to spend the festive season in the sunshine. Easyjet will change the names on the tickets at a cost of £35 per person per route.