I received a call from this number about switching electricity companies, they asked for my license number, date of birth etc. they said they were going to call me back and it hasn't happened. I called the number today and it said the mailbox is full.

They rang about 4 times a day for the last months. I have told them to stop and remove me but they persist.

I called back number (03) 9001 5884 reached voice mail but did not say for what company.