Standing up to your parents is not easy no matter how old or young you are - I admire your bravery and courage.
It is sad to hear that your parents decided to cut off association with you and I do understand that this might be difficult; my advice if I may offer some, is that you should always keep the door open for them to return when they feel they can but not just as parents but as equals.
Its not always easy for parents to admit that they were wrong and whilst it is tempting to give them a taste of their own medicine (especially if they have been away for a number of years), you show you are the bigger more mature and intelligent person by accepting their apology (no matter how cryptically it is expressed).
I wish you well.
All my best wishes.
Gary