Hoy should take a look at their ToS, maybe you are doing something wrong to claim those free spins.
I don't think it has anything to do with op doing anything wrong or their terms of service, Freebitco has been having issues for some months now, issues with withdrawals, as many people were unable to withdraw their money, some of the issues were solved, but obviously not all of it and some new ones have surfaced.
I don't thing there are freebitco support users here.
They used to have reps here on the forum, but they are no longer active. @TheQuin was a rep of freebitco, but they have not been online for many months now.