Please write us to email@example.com specifying login and unit ID of your device that you are trying to connect, then we can check your issue and try to help.
Also write a link to this topic in your email request, so that we can understand that this is you.
Most likely, this device was previously registered on another account and has not been deleted.
But don’t worry, we can offer a solution to this issue in any case.
We will wait for your reply!