Read this and use the secure webpage or the toll-free number to report this to Dell.
I have started receiving calls from Fake Dell Tech support.  I also have never turned in my asset tags for my pc's or tablets.. These asset tags are only held by Dell and to associate them to my cell phone which isn't listed any where either is kind of scary.. I believe Dell needs to tighten up their security as this is ridiculous and should be notifying customers of their breach!!  They call my cell and tell me there is something wrong with my pc and read me the asset tag number and then a few days later they would call and ask me about my tablet as well.  Nobody but Dell has this information....
Dell Customer List Has Been Breached