Unknown number called on our home phone during our family dinner. They didn't leave a message so we wont return the call.

Caller: Scam

Didn’t answer it, but when I rang the number - “ this number is not in service”

Returned call: 'this number is not in service' What is the point of this call?

Rang me 11 times today, don't leave message. Rings on landline which I never answer, let it to go to answering machine. It must be a scam, as no message left for me.

this number called twice in 2 days, did not leave message, so I wont be returning call

Caller: I don’t know

Called 5 times in a day, no message left

Multiple calls today from this number.
Number identification on landline helps with these type of calls.
Do not answer unknown numbers & never will ring them back.
Very annoying due to multiple calls even late at night

Caller: Noisy call centre from overseas

Free replacement electric hot water systems. I told him to ring my Dad instead of me.