Mango changes flight times

For the second time in a row Mango has changed my flight time, this time from 14:50 to 16:30 on the same day. This despite the fact that my flight is only next week! Why do they sell the tickets if they can tell a week in advance that the flight is not going to happen (and as I mentioned, second time in a row)?

I already paid for my transport from the airport, that I now have to change, paying the full price again. Will they pay for this? No way! Offer a refund? Not a chance! I don't see the point in booking well in advance if they can change the flight times willy-nilly. If my schedule changed I will not have any recourse. I will not make the mistake of flying with Mango again.