How do I contact AWS on the phone as a business plan customer

Hi

For security purposes, AWS Support doesn’t have a phone number. When you open a support case through the case console, select Phone. You're prompted for a callback number. You'll receive a call from AWS Support as soon as you create the case.

Please see this article for full instructions on opening a support case by phone

https://aws.amazon.com/premiumsupport/knowledge-center/aws-phone-support/