I haven't reported it. I usually just use my other non-crypto card when Mistertango fails on me

Yes, me too but that is not solution. If my Bitcoin debit card isn't working then I don't realy need it.
Besides, their high fees are getting on my nervs too so I'm thinking to abandon Mistertango fully and go to Wirex. They seam to be far better option at the moment.
I also hope that soon we will have better choice of Bitcoin debit card providers.