What is the next step if my husband has decided to refute our divorce?

Without more detail, it would be difficult to give a more detailed response.  However, based on the limited information you provided, you should retain the services of an attorney to assist you in your "contested divorce".  If you husband is contesting the divorce, especially if the divorce involves property and/or minor children, adequate legal representation is critical to protect your interests.  Issues such as "division of assets", "marital debt", custody, child support, visitation, the "marital home", tax issues, etc., must be resolved.  It is possible that your case could be resolved through mediation; however, to ensure that your rights are protected, you should retain legal counsel.