Contact Us
Last updated 16 October 2026
Questions about Chapter Zero, your account, a payment or a refund? Write to us and we will get back to you.
1. Email
administrator@liminalmath.com. We reply within 2 working days.
2. Phone
+91 9051440788, Monday to Saturday, 10:00 to 18:00 IST.
3. Address
Liminal Initiative
Kolkata, West Bengal, India
4. About payments
For payment or refund questions, include your order number. See our Refund & Cancellation Policy.