I'm sorry to hear about this.
See reputable and well reviewed ladies in good locations. With this type of entertainment, we are all running a risk in one form or another and it is best to mitigate where ever possible. When you are naked and in the throws of passion, you may not notice someone entering and stealing your wallet and keys. I never take my wallet and only take $50.00 more than I need. I park away from the location and keys are either safely hidden or the ignition only key is taken with me when it is split from the fob and other keys. Its easy to find your car if it is near by, they just press the panic button, the horn/alarm will give it away. With your wallet and possibly your vehicle registration, they now have your home location as well. Never have an outcall, unless you really trust the lady, to your home (or unless you are WestWoody and the lady is VJ).
There are lots of tips and warning from the community here, but number one, see reputable and well reviewed ladies in good locations.