Online shop threatens to block my device
I bought Macbook Pro from a local online store in Ukraine. I have the receipt and documentation. After a few weeks, they said that they had made a mistake and the price should be different than what I bought (+30%).
They say they will send a request to Apple to block my device if I don't return it. My lawyer says they are scammers and I don't have to because I have the receipt and the deal is done.
Is it possible to block my device at their request?
Thanks!