you should also lodge a complain with Canon Singapore and get them to investigate this issue (they are trying to sell your a Canon kit set without the canon kit lens). I believe if they are found guilty, Canon Singapore may probably stop distributing their equipments to them.
101% agreed with sinned79 suggestion to lodge a complain to canon at least.
Also check the serial number of your cam and lens with canon to see if everything ok, next thoroughly test the cam and lens for possible damage.