Connecting Chadstone to better PT

There are three train stations all within a few km of Chadstone shopping centre and show how it barely has any good public transport links expect a few buses. The biggest shopping centre in the southern hemisphere should have better PT access imo. Any thoughts on how to fix this?

There are three train stations all within a few km of Chadstone shopping centre and show how it barely has any good public transport links expect a few buses. The biggest shopping centre in the southern hemisphere should have better PT access imo. Any thoughts on how to fix this?