A support agent is supposed to speak on behalf of the company. If they say "your account will not be suspended for this issue", and the company then suspends the account for that issue, that should be grounds to sue.
Regularly XYZ does not happen, or not exactly in the way you agreed. They cancel your broadband too late, or your internet starts a few weeks too late, etc. You can try to get compensation, or even sue, but some of the damage has already been done at that point. While this okay for temporarily overpaying broadband, this is probably not the case for a company's main production system, where the risk is very high. The company might not even survive to sue.