I booked BUD-ATH-OTP for the end of June on a crappy OTA. First the ATH-OTP leg was cancelled and I was put on a later flight. Now BUD-ATH isn't running that day

I too rang up Aegean and got the 'hard sell' on the benefits of the voucher over a refund. Neither Aegean nor the OTA will help with a refund

As I booked with my Curve (debit) card I'm unsure if there's much use in looking into a chargeback option.

Is there any way to figure out how much this Aegean voucher would be worth? I booked via an OTA instead of Aegean as it was cheaper. If I'm issued an Aegean voucher for the lesser amount I spent at the OTA, I feel I may miss out on some value.

If Aegean offered a little sweetener (like Wizz Air...chucking in a 20% bonus with your voucher. But funnily enough they refunded my money in 4 weeks) I may be more tempted by the voucher (my 'travel date' is before July 1st, so I suppose I wouldn't be eligible for any 10% extra).