Jetline Travel
www.jetlinetravel.com
I'm going to make this as short as possible, if possible book elsewhere!
Their Customer Service is non-existent, send them a (complaint) Fax or e-mail and you will NOT receive a reply, call them (0208 5111640 - cheaper than their 0870 numbers) and all you will get is "... give me your telephone number and we'll call you back", they will NOT call you back! I called four times a day for almost a week, got the same response (i.e. call you back), they are a bunch of lazy immigrants (oh, and it seems everybody who works there is either a Manager or a Director, you know the type of place, where they even call the muppets Managers!).
If you want a cheap holiday, get your accommodation from Jetline (if you're really desperate) and book your own EasyJet flights (Jetline increase their total package price if they book your flights, check for yourselves on their site, an 800 holiday can be up to 200 cheaper if you book your own flights).
Also, make sure your booking is 110% accurate, if people in your party decide last minute they can't go (hospital appointment), and you need to change a name on the flights/accommodation, get that big credit card out 'cause your really really going to need it!
All-in-all 80% of the people I spoke to were non-trustworthy, ignorant, couldn't-care-less liars! If you've already booked and reading this, you're already bitten!