Looks like, I had my luck with it. I didn't attach any screenshot or files as proof that I delivered the digital goods. I just told them,
we had a conversation on FB messenger and he paid for a service and got it delivered on the same day and after 3 months, he's asking for the chargeback as an unauthorized transaction. Seems fishy to me. I also told them, I can't find the conversation history or screenshot to attach.
Well, it took around 3 days to solve the issue. However, I'm happy with Paypal.
Maybe they supported me, cz I have a full verified account or has no previous negative issues or chargeback. It was the first time and of course, using this PP account for 4 years.....
Thanks, everyone. <3