tried to return a call from this number (08) 8359 9231 but seems like its not active anymore

If you get a call from (08) 8359 9231 it is an outgoing line only.
Call (08) 8182 5555 and you can ask to be removed for the marketing list and they are more than happy to do thi.
They are very polite, you don't need to be rude like with some organisations, they don't try and sell you anything or convince you otheriwse.

I called back number (08) 8359 9231 reached voice mail for a company called triple I mortgage solution.

I called back number (08) 8359 9231 reached voice mail of a mortgage company but was not able to understand the name when it was mentioned.

it's AAA mortgage solutions

This number rings my phone every day and never leave a message

Two missed calls in two days from same number

Me too - no message left

Had a call from this number did not answer
And did not return call