This seems like a billing issue. If they had offline billing and monthly invoicing (enterprise agreement) I do not believe this issue would have happened.
If you are running an enterprise business and do not have enterprise support and an enterprise relationship with the provider, you may be doing something wrong on your end. It sounds like the author of this post does not have an account team and hasn't take the appropriate steps to establish an enterprise relationship with their provider. They are running a consumer account which is fine in many many cases, but may not be fine for a company that requires absolutely no service interruptions.
IMO, the time this issue was resolved by the automated process (20 mins) is not too bad for consumer cloud services. Most likely this issue could have been avoided if the customer had an enterprise relationship (offline billing/invoicing, support, TAM, account flagging, etc, etc) with Google Cloud.