You have the option to 'Refinance' or 'Increase'. Both of these enable you to access equity that you have sitting in your property.
'Increasing' is when you stay with your existing lender and increase your loan amount. In this instance stamp duty may be payable on the increased loan portion depending upon the loan's usage and the state/territory that you live in.
'Refinancing' is when you change to a different lender and increase your loan amount. In this instance stamp duty may be payable on the whole loan amount depending upon the loan's usage and the state/territory that you live in.
Refinancing or Increasing may enable you to access a more competitive interest rates and/or a more favourable loan structure.
You may also consider Debt Consolidation. This is when your several debts are consolidated into one loan, substantially reducing minimum monthly payments while putting more money back into your pocket for daily living expenses or investment opportunities.
This is where you package all of your debts (such as your car loan, credit cards, home loan etc.) into one new home loan. This combined loan usually has a much lower interest rate than that of your different personal loans and credit cards. As a result, the new minimum monthly repayment on this single loan will be lower than the combined total of the individual loan repayments.