Y'all are some rude people, it's just customer service. You should be happy these people actually care enough to make sure you were satisfied. Maybe you're the '[***]'
I recently traded my Honda Accord for a Toyota Camry and have received 4 calls from this number since then. The problem is when I answer there is no one there; when I don't answer they don't leave a message. Poor customer service (if that's all it is).