--- buyer is basically an asshole

Long story short:

Buyer (PhishMans) places an order after I tell him that such an order takes 3-5 days to complete which he agrees.

In the first day I boost his account for a bit (almost 1 rank out of 4 ordered) then I decide to take a break.
Buyer contacts me a few hours later asking why am I not working on the boost (think's he's doing my schedule) and I politely tell him that his order will be done on time and he shouldn't worry.

He proceeds to threatens me with chargeback(FRAUD) (as seen in the photos/link below) and I immediately terminate his order and fully refund him. He backtracks on his 'empty threat' and threatens me once more with a fraudulent negative feedback on EPICNPC.

https://imgur.com/a/pcaJR0h