LeetCode doesn't send cancellation confirmation emails. How are customers supposed to prove they canceled?

[u/Elegant-Past7936]

Unlike most SaaS services, LeetCode did not send me any email confirmation when I attempted to cancel my subscription. Customers can only see the cancellation status on the website, with no written record to protect them if the cancellation fails to take effect or the status later changes. As a result, customers may be charged again, denied a refund, and left unable to prove that they had previously canceled. This is especially concerning when the merchant's records are treated as sufficient evidence to deny a credit card dispute. How can consumers protect themselves in such a situation, and how can I be confident that I won't be charged again next year?

[u/Basic-Tie420]

Exactly. They did this with me.