Mallam is told to “shut up” whenever he tries to speak,so that eventually “the tea seller learned to swallow his words” why is mallam treated in this way?what does this behavior towards mallam add to

Mallam is told to “shut up” whenever he tries to speak,so that eventually “the tea seller learned to swallow his words” why is mallam treated in this way?what does this behavior towards mallam add to readers’ understanding of both his character and ghanaian society