Flexi Club booking cancellation policy

I have to cancel a booking for this weekend due to my Dad who might have tested positive for COVID... we are waiting results but need to cancel in time. Flexi Club refuses to cancel or even move the booking until they have proof that he has COVID????? Where does one's privacy come into play? So if I am not willing to provide you with that information you will allow a sick person to still go on holiday and put other people's life in danger? Pathetic to say the least