If you think, you're in the right position.

How about creating a case against (Stake) on CasinoGURU: https://casino.guru/complaints/all (they're professional, you can see by their finish case-solved). So the case can be discussed from different side.
- You
- Stake
- Casino Guru (As the mediator)

Casino guru will call (Stake) on there for the progress case. Me too as some user on internet will get more insight from different aspect about the progress result because we can see the progress.