a buyer opened a case asking about an item that was removed by ebay after he purchased it , asking me if he is going to receive the item, so I responded many times and added a tracking number and ensured him he will receive and that all the 30 people that purchased the item are going to receive it but it's been now 2 weeks awaiting for his response, so I'm asking does ebay close the case automaticly after 30 days if the buyer don't respond ?