The characters in the movie who take Chaucer's clothes when he cannot pay his gambling debts are not blacksmiths. Kate (Laura Fraser) is a blacksmith, and other blacksmiths who are dismissive of her are portrayed as well1.
Rather, the two characters you are referring to are Simon the Summoner and Peter the Pardoner, who are recounted in real Chaucer's the Summoner’s Tale and the Pardoner’s Tale.
1 Kate (Laura Fraser) is a blacksmith, and other blacksmiths who are dismissive of her are portrayed as well, but movie Chaucer does not threaten to write about them.