Is it obligatory for the questioner to work in a cigarette selling company, especially after being transferred to it from his specialization, and what should he do after the company rejects his resignation?

It is impermissible to work for a company that sells cigarettes. You can refuse the work because it was offered to you for accounting purposes, not to participate in a forbidden act. If the company does not provide a permissible job or reinstate you to your accounting position, you can file a complaint with the competent authorities.