Lovejones (wonderful handle!),
Plenty of people have gotten their money back. Ron clearly stated, very early on, that any pc who was dissatisfied should receive upon request a prompt and courteous refund of moneys paid. The only condition attached to this policy was that the ungrateful person could never again receive $cientology 'services', and (I believe) was required to sign a statement acknowledging that.
So, you must realise that should you succeed in getting your measly $500 back, you will be throwing away your Bridge to Total Freedom and will be choosing to spend your whole agonised future for All Eternity trapped in the WOG World of MEST and Entheta forever, and so forth, and so on? - Have they tried that one on you yet?
My advice: Don't get mad, get even! Get your money back and leave them in your dust! Don't let them put you on the meter; they are liable to try charging you more
money for a 'sec check'. - If one is neither staff nor Sea Org, it isn't required for routing out. If one is not a member of IAS in good standing, one need not even route out. They will try to feed you all sorts of BS, stall and delay if they can, but you simply stay resolute. They might try to get you to sign a gag agreement (that you will never say anything critical of $cientology or they can sue you) - but that's not necessary for a refund. Don't do it!
Just be cool, firm and persistent in your resolve to get your money back and have nothing further to do with Co$. Remember that they believe wholeheartedly in the 'reactive mind', and they are nothing if not reactive. They're not a 'turn-the-other-cheek religion', remember? So you don't threaten them, and they probably
won't be too nasty to you.
Somehow, whenever it comes around to the 'church' of $cientology, I'm reminded of the truly inspired words of Kurt Vonnegut Jr: It's Never a Mistake to Say Goodbye!
Best of Luck, Lovejones! Cheers, and let us know how you make out, please!