You. can claim statutory compensation. Depending on the distance of the flight, it migt be €250 or €500.
Oddly, I am in the same position. My flight back from Dresden on Thursday was cancelled a couple of hours before departure. There were no re-bokable flights until Monday on Eurowings, so I re-booked on another carrier, without communicating with EuroWings.
It was important for me to be back the same day, so I paid through the nose for a flight. Total cost was around €400 including a few other incidentals.
I'm using the Resolver service, suported by Money Saving Expert
https://www.resolver.co.uk/
I've used them before and it's really quick and easy to make the complaint. Last time, the carrier took a while to get my money back, but eventually they paid up.
This time around, I expect only €250 statutory compensation. I might claim the rest on insurance. But I have submitted receipts and so on to the carrier who cancelled the flight (EuroWings).
I expect a decent outcome. The worst case is that I have to stand €150, it's not such a big deal.