Support

Please include

• The email address on your account.
• What you were doing and what happened. A screenshot helps.
• For payment questions, the order date and the payment id.
• For lesson or editor problems, your browser and operating system.

Common problems

• I can't sign in. Accounts open with the paid courses. If a sign-in email doesn't arrive within 15 minutes, check spam, then write to us.
• I paid but my course is locked. Access normally starts within a few minutes of payment. If it is not active after 30 minutes, email us with your receipt. See Delivery and access.
• Which pass can I buy? The 12-month pass (365 days) is our main plan. The 1-month pass (30 days) gives the same access to all paid tracks for 30 days. Both are prepaid, one-time payments with no automatic renewal, available through Razorpay in India and our merchant of record outside India. Pass lengths are counted from the time of purchase shown on the receipt.
• Can I buy again before my pass ends? Yes. The new period starts after your current end date, so no days are lost. There is no upgrade credit.
• Do founding members keep their price? The founding offer is for the 12-month pass (365 days) only, limited to 200 seats. You keep your founding price for each 12-month renewal bought before your pass ends or within 30 days after it ends. After a longer gap, the list price applies.
• Will you remind me? We email before your pass ends: 30 and 7 days before for a 12-month pass (365 days); 5 and 1 days before for a 1-month pass (30 days).
• My access has ended. You can buy either pass again. Your progress is kept. Free courses stay free, and lessons 0–2 of every course stay free to try.
• The code editor does not run. The editor runs R in your browser. Use a current version of Chrome, Edge, Firefox or Safari, and let the page finish loading the first time.
• I want a refund. For a 12-month pass (365 days), you can ask within 14 days of purchase if you have completed less than 20% of the lessons in every paid track (no single track at 20% or more). The 1-month pass (30 days) has no refunds, except a duplicate charge or a technical problem we can't fix. Try lessons 0–2 of every course free before you buy. See the Refund and cancellation policy.
• I want my data deleted. Email us with "Privacy" in the subject line. See the Privacy page.

More help

For contact details and the postal address, see the Contact page.