I just keep getting missed calls.

Guys, call the number with caller ID on. It allows you to remove yourself from the contact list. Takes 3 business days to work, but it stops them.

They keep calling every day I keep avoiding them they will get the point sooner or latter.....

They haved called me afew times.
Tells you to call 1300 763 765
http://www.ocis.com.au/ContactOCIS/GeneralEnquiries/tabid/66/Default
A marketing company which is used by optus.

Anyway, i couldn't understand them, broken english mostly the problem.
You can call the number back to ask your number to be removed from the calling list.

This number is "Oceania Customer Services Austalia" a marketing company for "Optus".
To remove yourself from this list, as they are relentless in calling (up to 3 times a day everyday), call the number back, you get a voice recording explaining who they are and if you'd like to be removed from their marketing list.  At the appropriate command press 1, then wait for next command and press #, once done they'll end the call.

I've done this every 3 months, Optus are about to lose me as a customer if this continues.

Yes I've been getting them calling me too - every day - same time. I never answer. Now I'm glad I know it's Optus because my contract is about to expire and I want to go to Telstra :)

This number keeps calling me at least three times a day. I don't answer and they don't leave a message. If this is Optus - they might be about to lose my business.

This number is "Oceania Customer Services Austalia" a marketing company for "Optus".To remove yourself from this list, as they are relentless in calling (up to 3 times a day everyday), call the number back, you get a voice recording explaining who they are and if you'd like to be removed from their marketing list.  At the appropriate command press 1, then wait for next command and press #, once done they'll end the call.I've done this every 3 months, Optus are about to lose me as a customer if this continues.

This number never giving up calling me~! Who is this?? is anyone have any idea who is this number??