URGENT: flight cancellation, rebooking advice

[ringingup]

Croatia airlines has cancelled our flight from LHR this evening. No rebooking at airport. The only option is call tomorrow at 9 am, which would prevent us from taking a morning flight.

Would I be able to rebook myself and claim it back via the EU compensation route?

I also have insurance via Amex Platinum and BAPP.

[ringingup]

All sorted. There was an email address I used and I’ve been miraculously rebooked on the flights I asked.