In most cases, if you exceed your usage limits on the Hobby plan, you will have to wait until 30 days have passed before you can use the feature again.

https://vercel.com/docs/accounts/plans/hobby#:~:text=In%20most%20cases%2C%20if%20you%20exceed%20your%20usage%20limits%20on%20the%20Hobby%20plan%2C%20you%20will%20have%20to%20wait%20until%2030%20days%20have%20passed%20before%20you%20can%20use%20the%20feature%20again.

If you upgrade to pro, be sure to set a spending limit so you have a hardstop on what you can be billed for.