Paula,
I am so sorry you are going through all of this.
May I ask, what have you tried so far?
Have you told your parents what is acceptable and not acceptable behavior?
You are an adult, you have every right to demand to be treated with respect.
You have to be firm with them.
If they start verbally abusing you, put your hand up, and state with a strong voice,
''STOP. I will not allow you to speak to me unless you can be respectful.''
If they continue, and if you are physically able, can you remove yourself from their vicinity?
If they follow you, you must tell them that if they can have an adult conversation with you, then they can speak to you,
but if they are only going to abuse you , you are not going to tolerate even one more second of it!
Have you tried calling a friend or another family member to come there and stand up for you if you cannot stand up for yourself?