Under EU law you are entitled to

A refund of the full price you paid for your ticket within seven days for the part or parts of your journey not made (and for the part or parts already made if the flight is no longer serving any purpose in relation to your original travel plan) and a return flight to the departure airport as soon as possible.

or

Re-routing to your final destination as soon as possible or, if you agree, at a later date. (If the airline flies you to another airport in your destination city then they must pay for the transfer to the airport you were booked for or to another close-by point of your choice)