First of all, once you are exposed to the virus, you'll always have antibody in your blood. So the antibody doesn't mean the medication didn't work. Secondly, to test for "cured" , it means no virus is detected in your blood, this is done by a test called SVR which is run 3 months after treatment is completed. Lastly, Hep-c is a serious liver problem, you should get support from a medical practitioner.