I spoke with them, and have received calls from people claiming to be the same company three times over the past two and a half years. Claiming I have outstanding fees through Optus, when I’ve never had an account nor could Optus find anything with my details showing anything overdue (because I’ve never had a phone line with them). They repeatedly asked for my details (date of birth and address) and one time mentioned a random suburb of never lived in on their system. I had a lawyer friend with me when they called today.. she informed me that if someone was trying to get money they would contact by letter and would tell you where they’re from (which they refused to do) and wouldn’t be asking for details just be calling everyone they can to pay up.

Caller: scammers

These people are debt collectors.

I've been receiving calls from this number for months now. The first call is often followed by another call within half an hour. Also received calls from the same number except for the last digit which has changed. I do not answer the calls.

number is used by various companies/scammers most recently debt collectors

This number rings me constantly but I dont answer the call. Have tried to ring back but get recorded message "Optus regrets this number is not in service"
Weird!!!

Scammers

I called back number (03) 6217 9874 reached voice mail but did not say from what company.