My client is threatening me for a upwork complaint and upwork ban

[#1]

Hi, I have got an offer for"

**Edited for Community Guidelines**

 I accepted that and got client's message and got the project.

I have sent all the icons and images but the client claims that all the icons are not working. Although I have done these types of similar projects earlier also and received a 5* rating and have provided 100% client satisfactory work with unlimited revisions. But still, I rework those icons and sent again but still client claimed that the developer is saying the icons are not working. This happened 4times with me. I am sure that the icons are completely perfect. But when i send those icons 4th time then the client said that now the icons are ok and you can send all the icons + images. I submitted everything and the client release the payment. Now he/she want me to work on some new images without raising any milestone and he/she is threatning me that i hope you want a good review from me. Or saying words like I will request upwork to ban you and will ask for my refund. Please help me how should I deal with this problem even I have shared all the icons. The project was for a simple image and  2 to 3 icons but client want me to design 10 icons then and  i submitted all the 10 icons to him/her. 

Please help me out how to deal with this problem.

[#2]

Just ignore it? 

[#3 · Accepted solution]

Hi there, 

I'm sorry to hear about the bad experience you've had.
I checked your contract and at the moment, you don't have any refund requests. If your client submits one, you will be able to either approve it, or decline the request and open a dispute.
To learn more about how you're protected under our fixed price payment protection, check out this Help Article. Thank you.

[#4]

Thank you for your guidance. It really helps me a lot.