I sold an XTRA D-Link G604T GenII to a buyer. He declared it's faulty and now asking for a refund.
I tested the modem before sending it off. He said he called the Vodafone customer service and said they couldn't help him.
I don't want it back. I'm dead serious it was functional when I sent it off. My ISP is also Vodafone. I offered him to give him half of what he paid me.
I sold it in good faith.