Usual selling some cr@p -robocall

Caller: Company selling gas and electricity options

Didn't answer, when I called back there was an automated message saying that they called to discuss gas and electricity plans and please press one to speak to a consultant.

Caller: I don't know

Have received multiple calls from this number this week.
Either silence or they hang up as soon as we answer.

Caller: Some telemarketer

Not sure what they were selling, but they are quite persistent. I had 3 calls from this number this morning before answering

Caller: Call centre

Nuisance caller twice and noisy background when I answered second time after missing the first. Reporting this number as it’s not in here. I hung up after hearing obvious noise and blocked.