I have experienced it, regrettably astana is not the only douche-bag who has figured out the PayPal/CC charge-back scam.
PayPal will leave the funds in shakuru's account frozen until they get a final determination from the issuing CC company. In this case that will be astana's CC. Unfortunately for astana, his CC company will be looking at all the facts and documentation in the matter, and will have PayPal actively supporting their investigation. In the end, the attempted double dip will be obvious, the CC company will not reverse the charges to the benefit of astana, they will release the funds to PayPal, who will credit them back to shakuru. At that point, shakuru can determine what, if anything, he chooses to do with those funds, re-initiate a refund to astana, spend it all on hookers and cocaine, or buy more hardware to sell to other, honest, customers. It will be his money free and clear, and his alone to deal with. Astana will have no claim for anything, as his only claim now is the charge-back which he has already admitted was fraudulent.
It ties up your funds for half a year, but in the end, if the other party is a lying piece of trash who clearly attempted fraud, then you do get your money back.
And as a side note: @blue.dipshit? Feel free to contact me with your actual personal contact details so that I can provide you with the same for service of legal proceedings. I am certain that I am one of the parties that you feel has "defermed" you (interesting how both astana and blue.dipshit use the same mis-spelling on that word isn't it?) and I would welcome the opportunity to meet you in any competent court of law to satisfy this matter.
Of course, you simple minded little fuck-wit, you will have to find representation willing to take on your juvenile attempt at cyber-bullying, you will have to establish loci juris as to where the actual "defermation" took place, you will need to determine exactly how you would go about proving that anonymous monikers posting on a discussion forum, in response to your inflammatory insults and delusional diatribes, have defermed your own anonymous (and quite obviously fake) personality, but I would welcome the attempt. The last time a simple minded fuckwit like you attempted to bring legal action against me cost them in excess of one half million dollars, and I didn't even try to run up the bill. For you, I am cocked, locked and ready to rock, so let's dance little bitch. I will be looking for a PM with your exact personal contact details to arrive shortly so that we can proceed.