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Thank you. I didn't anything much, I just ask them your team members are selling over there, why don't you help them? Well, they did help their team members for a while and fallback to sit at the stall and start poke phone again. :/

Wow, I guess they're quite stubborn. Maybe they are forced to sell or they just don't care?
If I were you, I wouldn't know what to do either. Perhaps by motivating them would work.