Yep. Scam call. Has been confirmed by Diabetes Australia that these are scammers.

Caller: Diabetes Victoria (?)

Caller ID displayed number as (03) 9046 5209. Initial delay in pick up from caller then music. After about ten or so seconds of music caller did not identify themselves but asked to speak to someone (named). Caller not willing to identify themselves until I asked a number of times, apparently Diabetes Australia. Insisting that I had membership with them and wanting to sell on going membership ... No membership at all here. I asked them not to call this number again and hung up.

I called back the number (03) 9046 5209 and reached vm that said I reached Diabetes Victoria

Scam call

Caller: (03) 9046 5209

NOT SCAM. This is a genuine number of Diabetes -VIC Outbound Team ((03) 9046 5209),
I have called diabetes victoria on 1300 437 386 and confirmed and cross-checked everything from them.
Thanks

Caller: Zenia

Caller from Diabetes Australia selling membership with discount. Requested Card to process, when I requested an invoice with details to pay by BPay caller was reluctant and added she would not call again.

NOT a scam. It is from Diabetes Victoria - Customer Service & Membership team. They only call if your number is registered under a membership with Diabetes Victoria.

Do not provide your personal information - Potential phishing/scam posing as Diabetes Victoria

Same as before, answered and there was a delay then music. I hung up because anyone worth talking to does not call you and then put you on hold!

Caller: The number above, Diabetes Australia

Is there a way that this number can be identified as a scam?

Same as above, only music when I answered, so I hung up.

Span caller

Caller: purported to be from Diabetes Australia

As per another report, there was a delay in phone being answered, with a bit of music and then a caller identifying themselves only as from Diabetes Australia and asking for someone I'd not heard of (sounded like an Indian name). I told them wrong number. I suspect scam call based on the above report and the fact that the phone number does not seem to relate to Diabetes Australia at all.