this co keeps calling me it is dte and they want me to sign up for insurance on my appliances, i had about 11 calls i kept answering the phone and telling them to stop i didn't want their services, finally 1 person told me that i had to talk to a supervisor, i did that and the calls stopped for about a month now they are back this is the 3rd 1 today. i havn't answered the phone i'm out of min. on my phone and it costs me 50 cents a min. i need help. thank u.