Please request your tracker settings and make sure it is configured on the right server and port.
Also try to identify your tracker on id.wialon.net as one of the Benway ET300. If your tracker is determined, take a screenshot, write down the name of the model of the tracker and the identified ID (may coincide with the IMEI, may be part of it with zero or no)
After that, return to the application in the unit settings (unit menu - Settings - Common Settings), specify the determined model and ID. After that, configure the tracker on the defined server and port.