...is that it is not like dealing with other businesses.
Standards for customer service in terms of replying to inquiries is vastly different.
Set the bar low and then you will not be disappointed - on the contrary, you will be pleasantly surprised and appreciative of those who reply quickly, courteously, and articulately (and if she demonstrates wit and charm, that puts her off the charts in my book!).
It is also not worth spending too much time trying to guess "why" you haven't gotten a timely reply from a lady.
Assuming you comport yourself well, both on dates and in communications, then the issue has nothing to do with you.
In these situations, I just move on - and with no ill will. I may put in a follow-up request, or I may not.
I also would NOT report this to Gina, as personally I wouldn't want to "punish" a provider for this level of unprofessionalism. The lady may be a little sloppy in this regard, but if she still shows up for those dates that she DOES schedule - and delivers - I think this is MUCH more important, so I'd hate to see someone removed from P411 just for not replying to all date requests. Many of the ladies are just very young and with varying maturity levels, so you really shouldn't expect the standards of dealing with a fortune 500 company to apply.
Well, this is how I approach things anyway.
Most important words to learn in this hobby are "move on."
If you take care of your part, you will always have a fun time awaiting you soon - it might be a day later than hoped and with a different lady than you first hoped to see - but just learn to go with the flow, don't sweat the little things, and have fun.