Janna entered into a contract to purchase a house from Nick at a price of RM29,500.00. A week later, Nick forced Janna to pay an additional RM4,000.00 under a threat whereby Nick will cancel their agreement. Janna made the payment because she did not want to lose the house.

Janna would like to know her rights in this case. Support your answer with ONE (1) relevant statutory provision (Malaysia's Act) and ONE (1) decided case.