Check your paperwork from when you bought the home for by-laws or regulations regarding your participation in the HOA. If its not there, then they should have had a meeting since you purchased with a quorum of homes represented and developed a set of HOA laws and then notified you through certified mail. If they didn't do that either, tell em to f*ck off and get your attorney to send them a letter.
Besides, even if they had done this all legitimately, they can only demand your money, not how you pay your money.
Besides, even if they had done this all legitimately, they can only demand your money, not how you pay your money.