Need advice regarding PayPal -ve balance & chargeback request

- I was working on one website. I had an agreement with a client of $4000 and out of which he paid $2700.
- He was sending me money on PayPal.
- Suddenly, the client increased lot of requirements, and it created a lot of rework for me, almost 100% work.
- Also client's involvement is very less in the project. He wants us to look at everything from the reference site and do ourselves. Checking from the reference site takes time and a lot of things, we don't understand as well. It causes delay.
- I requested the client to increase the budget or pay every month. I told him a very nominal amount that will cover my employee's salaries only.
- He refused to pay extra and did not pay $1300 for November month. Also requested a refund on PayPal and now PayPal showing a negative balance

Let me know if you have any questions regarding this. Also mention "negative" at the start of your proposal so that I can see, you have read the requirements.

Please see attached screenshots from PayPal. If you have expertise in this, then I need only 10–15 minutes of your guidance.