You can always follow up a conversation with an e-mail to confirm what was said so that you can have the benefit of a paper trail. In my industry (construction) this is a vital part of the communication process.
As a senior manager, in my opinion, people rely too much on communication by text or e-mail and often this is where they fall down as interpretation of those texts and e-mails is very often not the same between sender and recipient.
As people have said before, a simple phone call to your line...