No-one's disagreeing that she's seriously messed up by wasting punters times. I would have thought to be a poor service provider, the punter would have sampled her services first. In her case those that get to see her have come back saying she's a good SP, however her fucking punters about is the bigger problem and a serious one.
As for treating them with contempt, I would disagree with you. Many other WG's would have taken a booking even though they didn't feel like it and given a punter a poor service. This doesn't make her actions any better, but at least the punters who didn't get to see her still had their money in their pockets rather than thinking I wish I had taken it elsewhere afterwards had she gone ahead. Of course, her actions are extremely poor, selfish and not considerate whatsoever towards the punters she messed about. She can have an attitude, I don't know her history but from my meetings she's actually a nice person deep down but unfortunately she has a few bad habits that will eventually drive her out of business if she continues down this route.
In my book, I consider a WG that consistently fucks punters over by not returning calls and texts after they have arrived at the place, as treating the punter with contempt. This is because the lady does not have the decency to at least inform the punter either that she doesn't want to see him, or that she has to cancel. Plus she makes no effort to correct the error of her ways.
Whether she is good at providing the service she delivers or not becomes irrelevant. The punter has had his time and money wasted (albeit less money, as the money for the punt would be saved) in making the effort to travel to the lady's place for his meet. As far as I am concerned that makes the lady a poor service provider as good comms are very important. At the same time, I do regard a lady who provides a bad service when they didn't feel like a meet as also treating the punter with contempt.
As for Renata herself, I have no intention of ever seeing her as the service she provides is not to my taste. However if she did provide the service that is to my taste, then given her consistency of fucking about with punters and treating them with contempt, I would have no interest in pursuing a meet with her as I wouldn't want to risk wasting my time, money and energy in travelling to her place, only to be stood up.