How to avoid scammers and fraudulent buyers?

[mianabidqayyum]

As experience sellers know well that Fiverr is a buyer's centric platform and it supports only the buyers in any dispute with the sellers whatever the case may be, therefore, I wish to know from the most experienced sellers that "if a buyer intentionally refuses the delivery with no grounds and keeps pressing the revision button and the CS refused to intervene (as the same happened in my last order) what would be the remedy with the Seller?