Hello, my acc was banned for buying gold from unknown sources, and I gave my money from a card that is legitimate. In fact, I was not instructed that I could buy gold from other sources because I gave a lot of money for the acc I made. Please If you explain the situation to me, then I have to create another acc. I know that I am legitimate because I paid with a card that is legitimate.
OP, your legitimacy is irrelevant.
You can send ban appeal with description from your PoV (but make sure you are using good translator). But RMT is bannable offence, Blizz/retail WoW ignoring it doesn't mean that others tolerate it.
If your appeal fail - it is gone for good. And amount of invested into it money you've decided to waste means nothing.