In my experience, Fiverr or Freelancer cannot force the buyer to accept the order. So, if the buyer does not like what we delivered, they can ask for a refund, and in this case, I don't believe Fiverr can do anything.
I cannot agree with this point, and based on my experience, there are some great buyers from those countries. Some buyers have even placed orders over $500 each time. So, it's not fair to categorize based on country alone. However, as an experienced freelancer, you can take some precautions to avoid cancellations.
Let me explain how I deal with this kind of situation:
1. If I feel any buyer might not be genuine, before I deliver the final files, I might just send a rough draft (not a delivery - make sure not to deliver unfinished work) and get confirmation on the direction of the project. Alternatively, it's always better to send a draft before the deadline without officially delivering, so you can receive feedback on whether they like it or not.
2. So, if they don't love it, you'll definitely have to work on it. But you've only sent a draft, so there's no use for them to keep it.
3. If they do love it, and they need any further changes, you can work on them and then make an official delivery.
In my experience, once they confirm the design and after you deliver, they cannot just say, 'We don't like it.' In this case, you can come to a point and show their confirmation to them, as well as to Fiverr Customer Support. This way, you have proof that the buyer was satisfied with the work but is now trying to scam.In this case, Fiverr will definitely help you, and at the very least, you could come to a partial refund instead of a full refund.
hope this might help