Dear Sir or Madam,
My name is Killian and I’m from Brazil and I can help you placing ads on most classifieds websites. These websites include: OLX, Bom Negócio, VivaStreet, Iclaz, QueBarato and others I would have to check. I would contact these companies acting as an agent of your company in Brazil, get quotations and all the necessary information to place the ads. Most websites have different types of ads as well so we would need to discuss what type of banner you would like posted.
How do plan to pay for the ads? Would the company invoice me and you refund me the amounts or you would pay them directly?
Best regards,
Killian
PS: I've written to you before for this project, I think.