phone spam

This was a new one for me.
Pick up the phone, hear what sounds like a live voice saying "Hello?"... I reply Hello, and the lady's voice says "I'm sorry, I was having trouble with my headset", which really makes it sound like a live person. Then she starts off reading some marketing spiel. During which I try to interrupt to say I'm not interested and would she please put me on their no-call list, but the voice just keeps on going without pausing, as if it must be a recording after all.
I hung up.