Caller: Robot caller

I answered and no one was there. Obviously I avoided saying at any time as I understand if they have a recording of you saying yes they can switch any supplier- electricity, gas, phone, nbn etc

I answered the phone and could hear that someone was on the other end but they did not respond and then hang-up. Tried calling the number back but got a mail box with a strange name.

Am going to block the number as am getting too many dodgy ones from and (08) area code like this

I called back number (08) 6214 4272 reached voice mail but did not say for what company.