Praise be to Allah, the Lord of the Worlds; and may His blessings and peace be upon our Prophet Muhammad and upon all his Family and Companions.
The woman is not asked to adhere to Hijab except when she wants to go outside her home or if she is in a place where there are men alien to her.
However, if she is in her home and there is no man alien to her then she is not ordered to wear Hijab. But she should cover of her body what should be normally covered when in the presence of Maharms (non-marriageable men) or in the presence of fellow women.
From the above you know that what these sisters told you is completely false.
We ask Allah to make us and you steadfast on His right path.
Allah knows best.