How to contact Serverless Framework's sales team?

Customer of mine is new to AWS. We recommended Serverless Framework, among others. They need a vendor contact / agreement before they use any product. They tried https://serverless.com/contact-sales/, no response in 2+ weeks. I tried tweeting a DM to @goserverless. No response. How do they proceed ?

Hi there. Could you provide a little more information about this customer? As far as a vendor agreement, the Serverless Framework is an open source tool and as such requires no vendor agreement in place in order to use, experiment and evaluate it.

If you would prefer to message me directly you can do so by email at gareth@serverless.com