The company deducts bad debts from the salesperson because the customer is late in paying back the payment. Is this reasonable?

This only requires you to talk to the customer carefully and ask the customer to pay as soon as possible. If the customer pays, the company will have no reason to deduct the money from you. If the customer does not pay or wants to sue before paying, this fee Only the salesman has to pay the bill. Why not you have resigned and are more willing to the company's actions.