Is github the correct channel to report a billing issue? I would assume github is a place where you report issues with the github project. When there's a billing problem, there are usually different lines of support.

For example, chatgpt when asked "How to report a billing issue with Anthropic subscription?" says:

Best way: Use Claude’s built-in support Log in to your Claude account at Anthropic / Claude.ai Click your initials or name in the lower-left corner Select “Get help” Use the support messenger to describe your billing issue (duplicate charge, failed renewal, refund request, missing credits, invoice issue, etc.)