AS we have no idea who the OP is on about. I thought I would add my tuppenceworth.
Same thing happened to me albeit several yonks back.
Arrived at postcode. Block of flats. Sent text saying (as instructed) "I'm here"
Then of course......nothing.
But strangely enough. Just a little way off was another bloke with his phone in his hand..........looking a bit like me. Getting pissed off.

I gave it the ten minute window of opportunity then walked. Like this other bloke did.
I always wondered if he had turned up to see the same SP and like me.......had been (I suppose) triple booked by her.
Also got me wondering if indeed some of the more shite SP's actually do overbook and don't care how many punters turn up etc.
They are always going to argue that we are all punting timewasters anyway.