I’m with Machadinho too. There are correct ways to convey a proper message and in this particular case adapt it to a professional register and this will help the employee to take it seriously.OK. But you should have explained that before. So let me rephrase it then. Por favor, nunca mais converse diretamente com nosso cliente sobre pagamento, ou seremos obrigados a procurar outra pessoa para fazer a limpeza. Literally: Please, never talk directly to our customer about payment, otherwise we'll have to find another cleaning person.