I did freelance character design work and comic pages for someone for almost a course of 1 year. He would keep ordering when a piece is done and sometimes would order multiple pages that would take me longer to finish.
We have not signed any contract, nor Non-Disclosure Agreement that I can post the work I did as my portfolio but just as a sign of good faith I honored his request to not post anything until he decides to do it on his own.
This January I still have a pending of 4 pages that I need to finish that he paid, 2 of them already a work in progress. Out of nowhere he sent me a message he would cancel and ask for a refund. Because of disagreement and I no longer wishing to have any more business deals with him I just refunded the work I haven't finished. And because we never signed an NDA I just posted the work I did for him as my art portfolio (never claimed they were my characters, just more of a design portfolio) I thought that was the end of it. He did send me a final email threatening me that he'll be watching me.
Then hours later he suddenly made dispute refund claims with paypal for all the pass work I did which were delivered via google drive which until now he still has access which now cause negative balance on my paypal. These are for all the works I have already finished and delivered via google drive. I've also sent most of them via email which I still have.
What can I do? I already sent the information I have with Paypal but I'm still scared of it being not in my favor...
You're help would be very much appreciated.