An option would be to top up another ‘bank’ account with it, using your Curve card, for example Revolut. But as it is quite a large amount, this is not without the ‘risk’ of being questioned about the origin of the money.
I have seen reports on this community of people after contacting Curve support, receiving the Curve Cash in their bank account (SEPA transfer), after giving Curve support their IBAN.
But I have also seen numerous reports lately of people having difficulties to even get a first response from Curve support. I have good experiences contacting them on Twitter (@askcurve), I did get a first response within a couple of minutes.