I’m having a similar experience with them. I contacted their DPO with regards of exercising some of my GDPR rights. They acknowledged that they received my request, but never replied again. They aren’t replying to any of my followups either. I really wanted to use Curve and was willing to get the premium membership, but I no longer trust them.
I used Openbank in the past. They are nice as a bank, with actual customer service, a responsive DPO etc. Expensive for international or multi-currency use though. And I found their mobile payment implementation a bit buggy and unreliable so I couldn’t trust it working enough that I could leave my wallet at home. But after my other two banks dropped support for mobile payments, and after Curve proving that it’s not a trustworthy company, I might have to go back to using Openbank.