I have cancelled my tickets for a Wizz Air flight. The refund is not the issue as "cancellation fees were higher than ticket price" and all that, but I need to have a cancellation confirmation in order to get some of that money via a travel insurance that I had made.
The thing is, I have received no such confirmation and a call center rep said that it "might arrive" in a week—that has also passed, and none arrived.
What else could I do to obtain said cancellation confirmation ?