You've been invited to an Interior Designer job, although salary is nice, but the role actually is drafts man (nothing to do with design). What are you going to do?

If the company is organized, and If the one who I should report to passed with this step (to work as drafts man) in an earlier stage, I will accept it. Then I will try to show my capabilities each time I can until I prove that I am a designer.

i'll convience them that i'm a architect designer through my work and efforts

It depends on How much respect you have for yourself