I'm sorry Renny that you are going through this.
I would not be very pleased with anyone if they did services that I didn't agree to that may cause issues down the road. Actually occurred with my car. I had taken my car to one mechanic to get looked at, and while there, they discovered a screw in the tire. I asked them not to mess with it, as the tires were under warranty from another location. Well, they went ahead and 'fixed' it anyway, and the way they fixed it meant that it could not be properly repaired by the place it was under warranty from. Needless to say, I had to get a new tire.... but the mechanics it was under warranty from were kind enough to not charge me a lot!
At least it sounds like Lili is feeling better!
That's what matters the most!
I do have to trim Charlie, my mitred conures beak, and he sits in my lap as I hold his head. No toweling required. He doesn't like it, but puts up with it, to a lesser or greater extent.... Afterwards, he's usually a little nicer and he beak grinds to try and get his beak back into "shape". (when I trim his beak, I have to remove the ridges in the upper mandible to get it back into shape.... and he has to put the ridges back so he can grind up his food...) I've been having to trim his beak for 9 years now, and he's 21 years old. Never had any issues after the trim.