Can you refund clients' money if they don't like your service?

[Btaliat]

Though there are some that can do this, not all can do it. There are sometimes when clients will not just like the works again. Most times, it may be because they don't truly like the jobs or something else. This will now depend on whether freelancer can refund the money or not. Can you do it as a freelancer? Will you return the money to the clients that complained that he doesn't like the outcomes any longer?