This is Australian Law, please solve this for me. Thank you

Question marks) Monocycle (NSW) Pty Ltd operate waste management recycling plants in the contracts they forward to their customers, who are usually small businesses, the following terms amongst others are included Monocycle are permitted to unilaterally increase its prices. Monocycle are not liable where its performance is prevented or hindered, even where the customer is not responsible. Customers are committed to subsequent contracts unless they cancel the initial contract within 30 days before the end of the term. Discuss whother these terms would be enforceable, clearly stating the law upon which you rely for your arguments Explain this law fully