T-Mobile agent's carelessness results in a nonworking SyncUp Tracker.

I had a less than detailed oriented T-Mobile agent take a SyncUp Tracker of mine offline. When another T-Mobile agent attempted to correct her colleague's error by placing the SyncUp Tracker back online, the device would never fully activate. It has been stuck in the onboarding process for nearly two weeks. Apparently, when the second T-Mobile agent tried to place the device online again, she thoughtlessly selected the wrong rate plan. While in onboarding limbo, the SyncUp device is nonoperational and therefore, useless. T-Mobile is still charging me for the device. One of the SyncUp Tracker manufacturer's engineering support agents advised me it should only take a T-Mobile agent a few minutes to correct a rate plan assignment error.