It really is a shame that you bought a banned console. Sometimes when you try to save up some money, you end up spending more in order to fix all the issues that come with such a risky purchase. It definitely pays off picking a bit pricier route in a long term, even more so if it's one-time purchase like this.
I'd try to return it to the seller and ask for a refund, if possible, provided they haven't explicitly mentioned that the console is banned. If they did, you should have paid more attention before purchasing it. Selling it for parts is not a bad way to at least get some money back. Better luck next time, though.