tenant quit paying on house I sold her with Quit Claim Deed - How do I get house back?

[Kris Kemp]

Hi,
I sold a house to a tenant and her boyfriend on a Quit Claim deed. They registered the house in their name. Then, they quit making payments. When I called the county, the lady who answered said "you should've done a security deed" and explained that, in case of non-payment, I can proceed with foreclosure.
I already advertised the house for sale and have cash buyers, but need to get it back in my name in order to sell it. Can you help me? What are your suggestions?
Let me know. Thanks.
Kris