You can't punish "false" accusations without silencing people from making any accusation out of fear lack of substantiation will be interpreted as false. We can't say that the driver did this maliciously; he may well have heard what he thought he did. The driver isn't the problem; he was aggrieved and reported it, as he was entitled to.
Tampering with someone's thermostat because you were entrusted with access to it and later decided you don't like them is sociopathic, and every bit as monstrous as deploying ransomware in a fucking hospital. I guarantee you no diligence was done to prevent collateral damage. More than the driver (blameless) or Amazon itself, this particular executive needs to be taken to task for such recklessness. Interfering with life support or communications systems is just fucked; we do that shit as acts of sabotage during war, and it's domestic violence when it occurs between spouses. Even your utility company needs to give advance notice of termination.
Yahoos acting on bad intel one too many times and punishing the innocent is literally what instigated Black Lives Matter. The irony is lost on Unnamed Amazon Executive.