Client is asking for refund after ending contract and giving me 5 stars and a good written review.

[#1]

I have completed the legal researh done for my client and he was happy. I conducted 2 Zoom calls with him (for free) and I only charged him for the written work that I have done. He ended the contract, gave me 5 stars review and left a good comment. Now he is asking extra questions every day and suddenly he is teling me that I failed to answer his questions??? WHY did he pay me and give me a good review then? Very weird. What should I do? Can it escalate? Can he change his review? I do not want to refund him. It's just $150 but I worked for this and I spent time researching for him. 

[#2]

Don't worry about it. The job is done, he paid you, and gave you a good review. There is nothing this client can do. 

[#3]

//There is nothing this client can do. //

Still the client can file a chargeback with his bank / cc.

Though Upwork will suspend the client's account and trying to solve it on behalf of the freelancer, first they ask the freelancer to solve it with the customer. 

[#4]

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 wrote:

Can he change his review? I do not want to refund him. It's just $150 but I worked for this and I spent time researching for him. 

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He cannot change the review, and even if you give a full refund, the private feedback will remain.

If the private feedback is bad, that will be used in the JSS computation.

Upwork should address this problem swiftly and effetively.

I know how stressful it can be if the client has a never-ending series of follow-up questions that are clearly not in the scope of the project.

ETA: If you are referring to the job ended on September 2, 2024, rest easy.

As Upwork now updates the JSS on a daily basis, the effect of a bad private feedback would have shown by now.

As you still have a 100% JSS, the private feedback was not bad.