Can I collect a refund being on Social Security Disability after winning a slot machine jackpot of $1,850.I literally had the casino take out $468.00 Help?

Now the SSI office is coming after me for not reporting this $1,850 Casino Jackpot. I had the Casino take out my federal taxes automatically and I walked away with $1,032 dollar's and now the SSI wants to know why I didn't report this to them this year? Also, The SSI wants to automatically deduct $83.00 dollars from my SSI check every month for at least the next twelve months. I can't believe this my friends.Should I file my taxes being on SSI Disability thinking I may have a chance of getting a refund for the $468.00 Dollars that I had the casino take From my total winnings that very same day for my federal taxes?