You probably doesnt understand, when I said " You can just contact their bank" , I mean you can contact their bank to tell them what he do, but you won't get a refund for sure
I understood it, no worries and I told you that the cardholder bank asked to dispute the payment to the acquirer (and PSP so PayPal) and they do not care if their clients are scamming because...you are usually not their clients

. They will prefer to avoid any trouble for their clients. Also, the bank manager dealing with the chargeback does not know anything about the online business and our world. He/she will be focused on maintaining a good customer satisfaction.
However, some banks started to limit the number of disputes allowed per card/per client. Its not to protect merchants, its just to limit the manual check and work for their employees. The other way around, banks started to increase the fees when you want to dispute payments.
Most of scammers use residential proxy with incognito mode for browser, i got scammed in this way by a kid
Yes of course, I was just saying that the PSP has the information about the proxy/vpn/etc., they can know that its connected to the same machine (each machine has a unique fingerprint)
Then, its another topic when the PSP has the info but does not use it to help the merchant to win disputes (like PayPal)
PayPal is very different than another provider, because they created their own dispute management system. It means that users will usually prefer to open a dispute than going to their banks, PayPal abuses this system to charge the merchants even if the REAL payment was not disputed like a normal payment provider. (so costless for them).
I worked a lot with them in my previous jobs and I found that they have a special "rating system" for some merchants and disputes. When you complain and point out that they are making mistakes on disputes and too many cases were lost unfairly, they will make you win more cases for a short period of time and then you will go back to a normal mediocre rate. Thats how to handle merchant requests and keep their relationships with companies.
With disputes, they are charging a lot of fees and making a lot of profits.
PayPal will always tell you that you have the choice to not use them
