I got a phone call from this number a few hours ago too.  Who are they and what do they want?

I got an automated call saying that they had sent me numerous letters and I had neglected to return their contact.  I pressed 1 to speak with a rep (I'm a finance manager at the dealership where I purchased my car, so I wanted to mess with him).  He told me that the Toyota Platinum warranty I sold myself was a powertrain warranty and I should cancel this immediately.  He was trying to get a credit card number over the phone.  When I told him I was a finance manager he hung up on me.