My credit limit was completely cleared after I unsubscribed.

Copilot's robbery-like subscription cancellation mechanism: My Pro+ membership has already been charged this month, and I was given a 7000 credit limit. I used 187 credit limit to fix a bug, and I felt I couldn't renew, so I clicked cancel. Then the remaining 6000+ credit limit was cleared. After submitting a support ticket, the bot replied that canceling the subscription would clear the credit limit. Isn't this robbery?!