Thank you for sharing your story. Not sure if what i want to do is give advice, but I'd like to share a few thoughts on your post, and please understand that they are just that, my thoughts.
Something you posted made me think:
My current situation in this: I faded and hold off on writing a disassociation letter.
I think that two months of not attending meetings cannot be considered that you "faded". The rest of your post is about all you're going through with your relationship with your JW parents, the fact that you feel the need to show them "the light", the slide presentation about all the research... all those elements indicate (at least to me) that you are still quite far from fading.
I'm starting to see a lot of people talking about fading as if not attending meetings is the one and only thing that one needs to do. How is/will be your life outside the WT? Do you have any support, friends, family, a career, education plans, a way of being self-sufficient, a way of supporting yourself financially, emotionally and spiritually without the need of dealing with JWs, including your family?
I'm not saying that you should go back, but leaving the WT like that - just my thoughts - doesn't mean that their influence is far from your reach.
And I'm curious about something: why did you have that conversation with your parents? It shouldn't surprise you that one of them or both will try to make you go back. Seems like that creates more problems for you than anything else.
Maybe something that can help is learning a little more about negative influence, and how brainwashing and being under the control of groups like the WT impact people's behavior and actions. You already learned on your own that the Wt is not the truth. Maybe you can learn a little more about why in spite of that fact they are still around, and why there are people like your father and the sisters texting you, insisting in you coming back.
You may find learning about that quite interesting and useful. That can help you work with your loved ones who are still JWs.