rang back few seconds after they called and its a diconnected number

Caller: I don't know

Don't bother answering it. I did and the guy sounded Indian. Told me his name was Adam calling from some solar company. I couldn't understand his accent. He was trying to tell me that the government has a $3000 solar rebate available and the "company" he works for has a sale. I told him i rent and then he said in that case you can't qualify. Then wished me well and hung up.

I called back number (03) 9005 6916 rang once then gets disconnected automatically.