Caller: A company offering solar panels

I could hardly understand what the woman was saying, but she was trying to tell me about solar panels. When I said I wasn't interested, and asked her to take my number off the database, she got quite aggressive, and then hung up on me. Wish I'd been able to catch the company name so I could complain directly to them.

I called back the number (07) 3222 6137 and reached vm that did not mention the company name

when answered they hang up.
when I ring back it say the number is disconnected.