We have no access to your account being members like yourself but from your neutral and negative feedbacks quite a few refunds were made, if these brought about defects, that is , you didn't answer the cases in time then this would have brought you below the standard of selling eBay require.
Click on your Seller Dashboard that will give you more idea where you need to imrove.
You will be restricted now to the number of items you can list, but there are still over 500+ listings, so these will have to go through if sold, without any refunds / defects being attributed, to bring your selling to the Above Selling Standard required.
