I've tried to have my Google Play developer account unsuspended by reaching out to a friend at Google and also had no luck. My initial ban was for "After a regular review we have determined that your app interferes with or accesses another service or product in an unauthorized manner. This violates the provision of your agreement with Google referred to above". I had two different apps using this API so that earned me two strikes in one go and then a ban for 'multiple violations'.

They say to submit an appeal at https://play.google.com/console/appealsForm?ts=BMS but if your account is banned you are also unable to access the appeal form.

I really wish there was a time limit on these things instead of a ban for life situation.