You know my advice will be to move. The cult bought your parents with promises of better things and look how it turned out. Like jp said above, one of the worst things we can do is to not be true to ourself. If your parent's support depends on blackmailing you to go do dub stuff, then your parents are showing how little they really care, unfortunately.
To thine own self be true. Your depression says it all. Get out and go be happy. You want to see how much your parents love you? Do what YOU want and you'll see that your parents are all about themselves, not you. It hurts. It sucks. But far too often in the cult it's true. If you lose them you will have to accept that fate as it's up to them. You have to be you and let them be them.
I totally disagree with posts telling you to suck it up because your parents give you material things while ignoring who you are and how you feel. Saying that you have it good at home because you have material things while you cry every day is mind blowing. Your soul is being crushed but hey, you've got an iPhone. Yuck. Life is about more than things.