I am aware that this is a different situation, however if all the other options listed fail it is absolutely worth pursuing your bank to get the money, regardless of whether it is a debit card or not.
I paid for my flyzoom flights last year with a Visa debit card and managed to get my money back after 2 weeks of the whole show going belly up. It appeared to be some rule/law about protection for individual transactions on a Visa debit of over £100 or £150. Maestro/Switch cards did not offer this protection unfortunately.
I'm sorry to hear about your situation, I hope this is of some assistance to you.