I do not think there is a local advocacy group in Bastrop for tenant's rights.
If you want to see if someone will assist you in advocating your claim for free, contact the Austin Tenant's Council
They may help you even though you don't live in Travis County.
However, to the most forceful thing you can do is take matters into your own hands by filing a suit in small claims
court/justice of the peace against your landlord. You can seek to force the repairs or to cancel the lease
and move out. You don't need a lawyer to do this. It costs about $100.00.
Also, if the living condition is truly unhealthy and unsafe, you can send a letter to the land lord stating that you are going to repair and deduct from rent. This is technically allowed under the law, although you will likely end up in justice court anyway.
Bastrop County Justice of The Peace
Bastrop, TX 78602