hi
i never played to 99slotmachines and i never will,they have the worst reputation,and not only them,also slotsinferno,slotnuts
they are a group of casino scams that's for sure
if anybody succeded to withdraw money from there then that would be a miracle i guess
but belive me,even a casino with good reputation can make you problems,if they dont want to pay then the casinos will find reasons trust me it does not matter that you played fair,so everyone must understand about the risk of gambling online,i dont say that all the casinos are the same it depends how lucky you are to find the good one.
cheers!