Complaint Review: Sirius XM radio

Both my mother and I were Sirius subscribers until I turned my leased car in and ATTEMPTED to cancel the service.  Then the issues began.  The representative "sold" me on a radio for my old car, which was free.  The radio came - along with a bill for the service on the car I no longer have.  Half an hour on the phone and that radio is cancelled.  Then came the bill for the "free" radio.  Another 40 minutes on the phone.  Since then, "free" trials have been billed; I have called to cancel service 3 times, each time agreeing to free service for a limited time - which I then received bills for.  If it weren't for the fact that "normal" radio is absolute rubbish (and mostly Mexican in Cali) I wouldn't have agreed to the "free" terms.  I finally cancelled my radio and agreed to a free 3 months on my mother's radio.  2 months later I receive a bill for my mother's radio.  I call to cancel my mother's radio after it automatically renewed (not informed of this when I agreed to the FREE term) and was assured the bill was ZERO and the account was cancelled.  After numerous (automatic) calls from Sirius telling me I have an outstanding balance I call AGAIN to discover the account was never cancelled and the "customer care" rep I spoke to didn't even notate the account.

Seriously, or should I say Siriusly (!) WHO is this company trying to fool?  It can not be that they only hire complete incompetent idiots...can it? If I add up the time and minutes spent on all the phone calls Sirius owes me!  It's a great shame because the radio itself is fine but the "service" is fraudulent.  Also a shame as I work for a dealership and our cars come with Sirius yet I can not stand by the service.  How is it that such a big company can get away with such devious practices for so long, apparently unnoticed?