Staff making up their own hours

I recently upgraded my account to premium which entitles me to explore many of your fine services and gym establishments, this past Sunday i visited your branch in PTA, Eco Park VA at 15:15 in the afternoon and to my surprise it was closed, when i enquired about this people said the staff make up their own hours. i Googled the trading hours prior to my visit and you guys clearly state you close at 19:00 on a Sunday, the website even states this, i am completely upset as a result, and im considering changing gym brands completely. PLEASE FIX THIS.