I would speculate that in that month's time she had seen so many clients that she got completely burned out, hence the terrible service.
At 50e per 'date' she would have to entertain a large number of visitors to make ends meet, to pay her bills (or her handler's
profit) , and so it is only so long that that freshness of a new girl can last.
That's why I think it is wiser to visit ladies who might charge a bit more, but have the luxury of seeing fewer clients.
(even if you are not wealthy, going for an 80e/100e punt {compared to 50e} won't break your bank ! Save up the extra bit !)
Just from your description, I feel terrible for that girl. What a waste, what a shame. My heart goes out to her xx