Helots were not considered to be citizens of Sparta, and they had no rights. They were forced to work on the land owned by the Spartan citizens and were not allowed to own any property of their own. Helots were also not allowed to marry Spartan women, and their children were not considered to be Spartan citizens.
Helots were often mistreated by the Spartans. They were subject to harsh discipline, and they were often beaten and abused. In some cases, Helots were even killed by the Spartans.
The Helots were constantly monitored and controlled and, as a result, they often tried to rebel against their masters, and there were several major Helot revolts throughout Spartan history. These revolts were eventually put down by the Spartans and the Helots were forced to remain in slavery.
The institution of Heloty eventually came to an end in the 2nd century BCE, when the Spartans were defeated by the Romans and their lands were conquered.