gym locker broken into told ***** not member

i went to gym as normal , locked my stuff with my combination lock. When i returned to get my bag my lock was there and when i opened the locked my bag was gone. The locker was broken, i immediately called for the manager for assistance, we searched all the lockers but my bag was no where to be found. I requested from the manager to check the cleaners lockers as they may have taken my stuff but he said he can't! ! I called the police after giving a description of the bag and its contents half an hour later the manager shows me my shirt, he takes me to a l locker we had searched with my friend and my bag was there. The ***** stole my iphone 6 plus, my wallet with all my money cards, credit cards, virgin credit card and perfume. when i asked for footage they told me they had a suspect however nothing has been done. it turns out the ***** isn't a member, so my question is why was he allowed into this premium facility unescorted? This is totally unacceptable. I was told by the police that the club is being difficult and they aren't giving the police footage why are the protecting a ***** ? Who is going to replace my stuff as i took the precautions but the club allowed this ***** in !!!