1- Details your your current loan account will stay till 7 years unless your lender (CC company) makes any change in it.
2- If you use credit card then make sure you keep low balance. This will improve your CIBIL score and report.
3- I don't recommend loans except home loan.
4- In case you need a new loan and you are having difficulty because of the 'defaulter' tag, you can try explaining reason for the default to the prospective new lender.

5- It will take years to build your credit history again. Don't dream of changing in a day or months.