Caller: potential scammer

Incoming call from a debt collection agency, betting they're the latest to buy the debt from other similar agencies, looking for who appears to be the previous owner of my mobile number.
Calling back after their staff member clicked off after I fired up from being harrased for the same thing as the last 10 agencies... and the answering machine at thier end reps a company called "New Offer". No ABN number for that business.

Caller: GREAT OFFER

This Number is an Organisation called GREAT OFFER. They are a Telemarketing Company attempting to Discuss Better Offers on Electricity Accounts. They have been calling me for Several Months (from Various Numbers), but regardless of being told on Each Occasion, they Continue To Call. Today, Friday March 24th (A.E.D.T.), they called me (on my Mobile) 5 Times, using 2 Different Numbers.
4:07pm on (03) 8103 7170 ... I attempted to tell them that they had been informed many times Not To Call My Number, and to Remove it from their Database. She was quite Persistent that I should Listen to Her, stating, 'Because Every Time We Call You, You Just Hang Up': I then Hung Up.
Then again on (03) 8103 7170 at 5:45pm (Missed Call), 7:22pm (Missed Call), AGAIN at 7:22pm (obviously within the same minute) which went to Messagebank - but they Did Not leave a Message.

And, then, at 7:50pm on (03) 8820 8597 (Missed Call).

(03) 8103 7170 is a Kalkallo, Victoria Number: (03) 8820 8597 is a Ringwood, Victoria Number.

I have obviously BLOCKED Both Numbers. However, they obviously have SEVERAL Number. I thought I was on the DO NOT CALL List, so I Registered again. When I attempted to Confirm My Registration, it responded as an Error, and gave me a LINK to Check My Registration. Upon doing so, it said that both my numbers are Registered. So, either the Confirmation Attempt Error Message was a Technical Glitch, or Calls Are Slipping Through. So, I would advise anyone who assumes they on the Do Not Call List, to Check If They Are.

Caller: Jason from Great Offer

Indian call centre company named Great Offer. I have spoken to someone who was supposedly their manager regarding one agent who said Fu*K you during a call, and was promised my number would be taken off their list. Got another call form them today (different number again), agent was Jason Belford (same name as one who was swearing). I asked him if there were any notes about my number in their system. He hung up.
Sick of these guys! Will keep reporting them.

Beware this might be a scam. I don't know anyone in Kalkallo Victoria.