If your loan is delinquent and you have only missed a couple of payments, contact the National Student Loans Service Centre about getting your payments back up to date. Visit their website for information about loan repayment options.
The Repayment Assistance Plan can help you manage your debt and avoid missing payments. The Revision of Terms Plan lets you adjust your monthly payments.
You can find a list of debt management programs in the Get help with repayment page.