BILLING DISPUTES.Customer must dispute any charges for the Services in writing to Crosswind within thirty. 30) days of the date of the charge by Crosswind. If Customer fails to provide a written statement disputing the charges within such time, Customer waives any objection and further recourse with regard to such charges. Written statements disputing charges must be sent to: Crosswind Cloud Solutions Corp., Attention: Contract Administration, 1221 Farmington Lakes Dr. Oswego, IL 60543 or support@crosswindvoip.com.