To be honest, I wouldn’t bother contacting CS unless you really need to. They can misinterpret requests and this in itself can cause problems. The issue regarding contact information is also overblown.
99% of orders would be impossible to complete on Fiverr, if there was not at least a partial exchange of contact information. You can’t create a logo or anything audiovisual for a brand, without knowing the brand name or website. Neither can you write blog or promotional content for a brand or individual, without first being linked to their website for context.
The majority of buyers understand that sellers can’t create anything without basic information like web URLS etc. In this case, they provide it upfront. This usually makes it easy to grab whatever information you need to complete a project, without having to explicitly ask for contact information.
The main thing to remember is never to send buyers your personal contact information or ask for theirs. You may also want to avoid bringing clients to Fiverr who are used to communicating with you privately via email etc, as this can cause unnecessary problems.