I didn’t mean explain to that woman, but explain how it came to that review for other potential buyers who may look at your reviews.
I understand how you feel and there are pros and cons to both cancelling and not cancelling in such situations, you need to decide that for yourself, I just wanted to mention that you will be able to comment on negative reviews, in case you get them, so that potential buyers can see both sides and decide whether they still would want to hire you or not.
If I, as a buyer, see something like this as a reply to a bad review
it won’t keep me from ordering from that seller, because I won’t ask anyone to give me more than I paid for, for instance, sensible people who don’t want to exploit others, would still order, and those are the customers one wants anyway. If such who’d plan on doing the same, won’t hire you, all the better.