I called back number (02) 9071 8110 rang once then gets disconnected automatically.

Haven't they heard of the do not call register?

Scam number- said they were from Vodafone

Called always engaged /no signal definitely a scam /hoax
Plus when they call i answer and there is complete silence

Caller: (02) 9071 8110

Got a call from this number saying they were from vodafone, offering me a new iPhone 11 or Android. I called the actual vodafone company, he checked my account and said their has been no calls made from them to my number. He told me it was definitely a scam.
DO NOT GIVE PERSONAL INFORMATION OUT.

Caller: scammers

yeh they ask you for your vodafone pin then log in to your account and order an upgrade with an iphone and ship it to themselves on your account then you have to pay for it.

Scam number.

One of a few numbers that appear to originate from Sydney, but is being used by an Indian syndicate. They will try and phone via other numbers as well. These guys may hold personal information (they find it on the internet) and will try to intimidate and coerce people into paying them money. Block immediately!

Sick of them calling

Caller: Vodafone

Trying to offer me plans for Android and Apple. Told them no thanks and he started to get aggressive.

No message left. Don't know number

Auto disconnect on return call. Blocked number

Caller: Vodafone

Offering data plans and apple/android upgrades