My question is if I have any legal recourse in not repaying monies that SS says that they overpaid me over a 19 month period

I applied for Social Security in 2009 when i turned 62. At that time i was told that I could collect partial payments of my husband''s Social Security. My husband is deceased since 1986. They started the payments and then approximately 19-20 months later they told me that they over paid me in the amount of $6,140.00. They told me if i didn''t make payment arrangements they would take my whole check. I made the arrangements to avoid having my whole check taken then they sent me a letter saying I owed $12,110.00. I went to the office to have it straightened out at that time they told me that instead of owing $6,140.00 or $12,110.00 I owed $7,859.00.