Trying to keep my home ammended 7 originally intended to surrender as no income, now I can afford to keep it, but cannot convert

After becoming unemployed I filled a chapter 7 in December, I had no income, got a discharge in April. At filing I was going to surrender my home. My case is still open I have ammended my filling and wish to keep my home. The 1st mortgage made an error and can not foreclose and probably don't have a lien. I have filled a homestead exemption with the county but the trustee still wants to sell the house. As I had no income at time of filling I can not convert to a 13. How do I save my house? My equity is about $70,000.