Changed Flight Terrible Service

<p>I booked a flight over a month ago for me and my family memebers i booked early flights so that we can be at a wedding at 12 am on Sunday but flight got cancelled and now been put on a flight at 11.40 am to arrive at 13.30pm what do i do because if i knew would of rather booked with Kulula airlines? I cant leave the day before as im working this is not fair from Mango at all really dissapointed with the schedule structure of the company.</p>