The buyer was concerned about this transaction, it seems - they sent a message asking:
“please confirm flax contract”
In response they did not get a contract. They got a thumbs up. What's next, text a thumbs up to a car salesman who is trying to get you to agree to a deal and now you've signed the contract? Contracts have much more in them than a text message could convey. Perhaps I'm being to legalistic, but this is a court matter.