nivsey, who did you book through ?
for example if you booked through expedia, you may well be covered under their ATOL (number 5788) other are like wise eg ebookers.com or travelhouse.co.uk..
the CAA, gives this advice..
you can find out more here :
Failure of Scheduled Airlines | Air Passenger Rights | Consumer Protection
3 February 2012
Malev
On 3 February the Hungarian carrier Malev suspended operations and cancelled all planned flights from that date. More information and contact details for the airline can be found here1.
Passengers who booked through a Travel Agent are advised to contact them in the first instance.
Passengers who booked directly with the airline using a credit or debit card should contact their card issuer.