Comment by crazygringo

So much information is missing from this.

What Google account? Is it personal Gmail? Or your academic account? Are you using this for personal reasons or professional or commercial reasons? What kind of payment method is attached? What was your level of usage? Any idea why you were suspended initially?

Because it could be that Google is reviewing your appeal and simply shadow-denying it, and you haven't provided the right information to make it look legit. E.g. if they think you're a spammer or mining crypto or they think you're creating additional free accounts to use free credits, they're obviously not going to tell you what makes them think that.

But if this is for university-related work, and your university purchases IT+cloud services from Google (as they probably do), talk to your IT department so they can get you in touch with their institution-level support. Obviously, for the attached Google sales rep, the last thing they want is a CS researcher losing access to GCP.