Refusing to release deposit due to Corona Virus

So, we want to cancel our friends bachelorette at Beefcakes Johannesburg this weekend due to the stress of covid-19. No services have been rendered. Literally booked online. Paid a R750 deposit which they won’t refund. They’re not being accommodating at all considering the massive health risk at stake. It’s NOT FAIR to their clients. During any other circumstance, I’d be happy to lose my deposit but seeing as it’s a situation BEYOND OUR CONTROL... I think it’s only fair. Poor form, guys. So I have to lose my money because I don’t want to risk being sick