Exactly I looked in the history, but it is true if no part is credited because of a bug, we can not play them and so the game will not be in the history. It should also have a history of free spins like boosters and credits paid.
I assure you, you are entitled to your 15 free spins every day whether it's a day of the week or a weekend.
However, I remind you that the Customer Service can make a compensation only for parts debited on the history and which have encountered an incident. You understand that, for the sake of fairness to other players, the service concerned can not reimburse you for non-debited portions of your account.
Know also that the Customer Service listens to all players whether they are paying or not and tries to resolve your incidents as quickly and efficiently as possible regardless of your status on the site.