MOULDY Chocolate Mousse Cake

I just bought a slice of Chocolate Mousse Cake from your Monument Road, Kempton Park restaurant!! I was SO looking forward to it!! In the end it tastes DISGUSTING, old, and THERE IS MOULD growing on it!! I have photograph to PROVE this!! I posted the photograph on your Facebook page!! I think selling it for R49,90 is UNACCEPTABLE!! Them even selling it to me at all like this SHOCKS me!!