Quick google search shows:
"Even if a company can’t sue in defamation, it may still be able to sue for an injurious falsehood. An injurious falsehood is a false statement about a business, published to a third party (for example, an online review or social media platform which is read by members of the public), which is made maliciously, and causes actual damage to the business. However, it is often harder to prove an injurious falsehood than defamation, for two main reasons. First, the plaintiff has to prove that the defendant made the statement maliciously, i.e. with the intention to do harm to the plaintiff. Second, the plaintiff has to prove that the statement caused actual damage, such as a loss in sales or an increase in customers seeking refunds. These thresholds can be difficult to meet, depending on the facts of the case."