Similarly, what ACL are asking for is also quite proper and within the law that protects me and you and everyone. They're asking that a case that will specifically damage their business, and which has already incurred significant costs to them (and has been lost), be dropped.
There's nothing illegal about that request. No one is depriving SISU of their legal right to appeal - all ACL are saying is that we can't do business with you whilst you're holding that over us.
And apologies, but you're making this out to be a quest for justice, when in fact it looks to most people (including a neutral arbiter of law, the Judge) that SISU's primary motive was to distress another business in order to pick it up on the cheap. So your suggestion that SISU should appeal seems based on your opinion, that they've got a case, when a judge has clearly stated that they haven't.
So forgive me, but what it seems you're saying is that SISU should have the right to appeal, but ACL should not have the right to refuse to negotiate if SISU choose to do so. Apologies if I've misunderstood, but I couldn't agree with that.