Bid or buy seller protection ??

[naushm61 0]

Hi Guys ,

 

can anyone assist me with this question i have? I sold a second hand tag heuer connected for around 9000 rand. The buyer  then claimed i sold it to him with a cracked strap. Which was clearly not the case. After BOB acknowledged there’s nothing wrong with the strap . They still said the buyer can send it back for a refund. How can this be right? What if the buyer used the watch or damages it? What do i do then? Do i have not rights or protection on my side?