Cancellation of a project on freelancer.com, how not to spoil the karma?

Question

Freelance

The dude's admin quit and unexpectedly started running out of space on the server. While I was figuring out how the server works, the customer came into contact with the fired admin and the admin quickly fixed everything. I have a million questions about the server device and the past admin and all sorts of coincidences, but this is not about that now.
Now the customer wants to pay me money, but I don’t want to take money from him.
1. To be honest, I didn’t do anything
2. I’m afraid that he will write in the reviews that I’m a brake or something like that (the deadlines I announced for the project have not yet come out)
Question: what should I do to minimally spoil the rating?

Answer 1

ЛОгично же просто поговорить с заказчиком и спросить готов ли он оставить хороший отзыв если хочет заплатить, если он не удовлетворен и ваши старания ему показались не достаточными то просто сойтись на закрытии сделки без плохих отзывов, всегда не понимал людей задающих такие вопросы тут, вместо того чтобы просто поговорить с заказчиком.