Caller: 0489 994 626

I didn't answer but seeing as the other comment said it's a scam and it's the exact same number I think it's safe to say

Called about an eBay giftcard voucher, claimed to work for eBay. I feel like this is a scam as it came from a mobile number and I haven't ordered or recieved such a thing by email.

Answered the call and they waited a few seconds and then they hung up. Based on above comments sounds very much like a scam as was from this exact mobile number.

Caller: I don’t know

I answered the call and said nothing, I heard background noise for 3 seconds and then they hung up.