You have legal rights as an employee even if you don’t have a written employment agreement, because a verbal agreement between you and your employer is still legally valid.
The terms and conditions of your employment relationship will include:
the terms and conditions you’ve agreed to verbally
the normal practices in your workplace
the protections for employees in the Employment Relations Act
the minimum conditions guaranteed by Acts like the Holidays Act and the Wages Protection Act (see the chapter “Employment conditions and protections”)
the protections provided by Acts such as the Health and Safety at Work Act 2015, and
the basic obligations that the courts see as implied in all employment relationships (see below, “Basic rights and obligations implied into all employment agreements”).