khula

Husband denying issuing three talaaqs

Q: My husband has divorced me many times in breaks of months in private only in fulll words two times and once ke tujhe talaaq pe talaaq. Third time he said ke jaa tujhe teesri talaq. But he didn't have any knowledge at that time that through uttering in such a way, talaaq happens and he had no intentions also. Now he is denying every talaaq and saying that I just gave once talaq and all muftis here in India are taking his side saying that aadmi ki gawai maani jayenge if I don't have any proof and witness. He is ready to take Quran oath and do Tajdeed-e-nikaah with me. What should I do as I am really confused because some are saying that he is still your husband and some are saying that your talaaq is valid and you take khula from him. What is the real Islamic way if the husband gives talaaq and later denies it by lying? If I go with him, will I be committing zina? Please help me. Is my talaaq valid? What should I do?