How do I contact customer service? You can reach one of our devoted customer service reps toll-free at 1-866-661-1218 Monday through Friday from 8:30am – 5:30pm EST. You can also chat us and we'll get right back to you with a response. What are your customer service hours? You can speak to a customer service representative between the hours of 8:30 am to 5:30 pm EST. Or visit tsicustomerservice.com anytime. How do I order replacement parts? Call 866-661-1218. Or visit tsicustomerservice.com anytime.