This thead might help – Is "ITstor" a trusted eBay supplier?
If you get a DJI drone that has been activated in the past you can get DJI refresh applied to it.
Contact DJI and they will open a ticket for you on that one as you need to submit a video of it working etc but you can do it - the same if you activate a new drone and don’t apply the Refresh within the 24hr or 42hr window they give you. Then any issues is with DJI