Someone can’t just call the Bitcoin company and make up a lie that they never received their product. Once you have the Bitcoin it’s yours.
This is one of the best benefits I can think of about accepting Bitcoin or cryptocurrencies as a payment method when compared to traditional payment methods where one can open a dispute after making the payment and taking the goods and the banks or even the authorities would start questioning you about the transaction, lol.
I have seen this happening a lot where people buy something, make the payment online, and then open a dispute through their banks by saying that it's a fraud payment and they have been scammed and guess what, your bank blocks your account and confiscates the funds when they receive the complain from the other bank which is completely absurd because they don't ask for any proof from the other party and start questioning you about it and ask for payment proof, etc.