Right Storm, this happend to me with the very first sit I had. I woman marched in, changed the time to an hour earlier than I had agreed with her boss, and told me some very personal info about another one of her client's finances ( I happened to know the woman she was talking about). Like me, you probably don't want the bother but I urge you to get in touch with her boss and tell her exactly what you told us. I complained about the woman who came to me and the boss was horrified, you don't need to be rude or lose the bap, just tell it how it is. If this agency is worth it's weight in salt, they will want to give you a good service. Others complained about the woman I got and her attitude, and she was out on her ear very quickly. The boss is very good to me now and helps in anyway she can because of the bad start, I finally got a lovely girl whom is like part of the family now, we couldn't do without her and mum and I look forward to her coming. The whole point of a break is for you. I sometimes just go upstairs, it doesn't matter if there is anyone else in the house. Storm you have to report this. She may be bullying the more vulnerable people she is sitting for. Don't let it happen. Let us know how you got on. This is not right and it will get the service a bad name, contact the boss and request someone else. You're owed a break and some decent service, only you can make sure you get it.
Good luck