The arbitration has been discussed at length. Part of the original contract was that Amarex would perform its duties professionally, in accordance with industry standards. They didn't. They broke the contract. There are many pathways to get this out of arbitration and into court. Amarex's new parent company got involved too (saying that they would investigate -- and then they did nothing except make it clear that THEY were calling the shots and are now a party to any lawsuit), and allegations of actual deliberate malfeasance/sabotage would also be a pathway. I can't imagine that a crackerjack team of lawyers in a firm like Sidley would have trouble breaking the arbitration provision in the contract, given the magnitude of Amarex's failures to live up to the contract.
Allegations of actual malice and deliberate failure to perform the duties would seem to be a no-brainer way to get into court -- and one that Amarex and its parent company would be insane to let go to court, given that it would destroy their business.