I actually did have a therapist offer to refund me once. I found her incredibly rude and she said things to me I found that were like negging and patronizing almost? I came away from each session feeling like she didn't like me at all, and that we hadn't done anything at all, like I was speaking into a void to someone who offered me exactly one piece of advice the whole time. I drove myself crazy trying to figure out if I just wasn't getting something or was I just the asshole or what, and in the final session when I finally burst into tears because I felt so belittled and like she disliked me, I told her I could not continue with her because of this, that she had said almost NOTHING to me save for one sentence that I considered anything like therapy, and that I could not continue throwing a lot of money at this when I felt completely unsupported and unsafe, and I left. (Whether I was wrong or not we weren't getting anywhere or jiving so there was no point). She left me a very patronizing voice mail where she snarkily apologized and offered to refund or refer me elsewhere. I did not return her call. Maybe it was a me problem, to this day I don't know, but I had two therapists after that (one retired) and we got along just fine and made plenty of progress. I really don't know. I am not going to not pay someone for their work regardless of what I think of the job they did as that's not ethical, but that was several hundred dollars wasted.
I did have the faintest sense that the senior therapist in that practice didn't think a lot of her either, as she walked into one of my sessions as we just had sat down to begin and said kind of coldly "May I talk to you?" to my therapist and they took off and talked for a bit, and she didn't seem awfully happy when she returned (and she deducted that time from my session which amazed me). She isn't there anymore according to their website. I really don't know. I still feel awful when I think of her.