Have been receiving unsolicited calls form 03 7037 63xx for the past month or so.
They don't take a gentle 'get lost, I'm not interested' hint, at all.

Caller: London Gates Royal Investments

Have been receiving unsolicited calls form 03 7037 63xx for several weeks. Then, the call changed to other numbers such as 08 1700 1680, etc. According to https://cfxscamalert.com/, London Gates Royal Investments is a clone firm operating in the United Kingdom.
It disguises itself as a legitimate firm whereas it is not.
Stay away from this scammer just like Glfinanceukltd.com lest you lose all your investment in the name of trying to grow your wealth.

don't answer any number that begins 03 7037 63XX. They threatened me. I don't believe they are Australian based.

These people in Melbourne keep calling and if I block the number that change it slightly so how can I stop them

6 calls a day over past 2 weeks of different variations. Got another call while writing this. Must be your number so stop or will take this further