Parents paying dasond on my behalf :(

My stupid parents are paying dasond to AgaCon on my freaking behalf (bcoz I had openly refused that I won't pay a penny to this cult anymore). I used to tell them my freelance income. I ain't earning much now but how long will they continue this. Once I start earning the big bucks, this won't be sustainable but knowing them they will still continue this somehow. When they freaking grow old, I gotta pay for their expenses because they refuse to do financial planning and I can leave them hanging.... Ughhhhhh... I hate this... What to do?