What happen in thailand on paypal Singapore when you ignore a paypal buyers protection case ?

I sold a electronic item one month ago to the usa , after over one month later the buyers claim he cAnot switch on again!

Now he open a case against me the first on paypal Singapore and my Acount is 11500 Bhat in minus!

The case was open over eBay not over pp

In 10 years I have maybe 7 cases in my eu paypal Acount , I try one time out what happen if i not pay, shortly a bill plus 100€ Lawer fees areives from paypal lawers

Is this same process in Thailand also?

Or is there any diffrence?

Also I recognized leaving kasikorn and scb Acount in my paypal that paypal want i confirmed my scb Acount again, sending to small amount in it at moment I canot logg in coz not find my pw only recognized that also the monthly SMS notification not come since long time , can it happen that scb disable accounts without informing there customers by email ?