^ The script you had imported would have just created the necessary account for pool ticket purchasing & voting. You can just configure (or re-configure) your wallet to buy tickets into another pool, or to buy them in solo mode. There's nothing really to "revert", so to speak.
(sidenote : there is something that could be reverted, but I don't think you'd care for all the details, and it's not really helpful to your case)

Tickets that you had bought in the past, will eventually get picked to vote, or get missed, or finally expire. The very longest that you can expect for the last of your tickets to be returned, is about ~4.7 months, which is the expiration time. Most likely, the majority of your ticket funds (if not all), will return to your account much sooner than that.