Hello I sold a car to someone who has now raised a dispute about me.  I keep getting threatening emails from trade me that they may close my account.  The car was sold in good working order after a recent issue was fixed and I provided the receipt to the buyer.  They asked for a refund, I suggested that they contact the mechanic who recently fixed the issue.  What do you suggest I do?  Wish trade me had a ph number or customer service line that I can get support from. Thanks