Dear
If they are not allowing you to enter the matrimonial home you should file a case of domestic violence against your husband and in-laws.
This case will be filed under section 12 of Domestic violence act.
You have right to reside in matrimonial home as per section 17 of the act.
You can claim various reliefs under this act such as
Protection order under Section 18
Residence order under section 19
Monetary relief under section 20
And compensation under section 22 of the act.
Other thing you can do is lodge an FIR under section 498A IPC against your in-laws for cruelty against you.