First of all I would strongly recommend to check some reviews before doing bussines with any online casino. For your further action I recommend these:
https://www.askgamblers.com/
https://casino.guru/
On both sites you can ask for help, not only check for reviews. From my experience the advices they give are pretty solid, so try your luck there.
Anyway, I wouldn´t worry that much about no deposit bonus. It would be much worse if you would actually put some money there.