Bonus credits can not used to play in Slot game.
Ticket never be answered.
You are complaining many things here but you did not give more details to playbetr. How could you expect to get a specific answer if you did not tell the issue with more details?
At least tell them which slots you are referring to, I did tell them when I was unable to play slot game long time ago when I got bonus so they could take a look at the issue asap.
I wont be surprised if they did not answer your tickets if your ticket is just the same like your post here. So be more specific in giving feedback, complain, or any other things.
P/s: pls do not quote my comments, it is not help any thing. Thank you.