Find the manager or replacement manager who bought it, who owns it inside the corp. If the internal cost owner left the company, the PO department might be emailing them for confirmation with no replies.
Send an email/letter to their legal department asking for help to resolve the matter, if they can call the PO department and resolve it, and say its been 6 months and they are in breach of contract. Be nice.
1. Go to LinkedIn. Find a mid to high level finance executive at the firm. Add. Explain. They know some of their processes are somewhat shitty and might have the grace to pull some strings / sent some internal cold mails (in ultra large firms, mailing far outside your sphere feels like cold sales) to get things resolved.
2. Sent a snail letter to the CEO. The CEO gets little post that isn’t outright spam. This gets read by an assistant and passed down the chain. Down the chain gives very large urgency. The assistant to the CEO doesn’t know anyone five steps down. So you are coming in like a champ.
Both tips would work in my firm. It’s what I’ve use once or twice to get proper service without lawyering up. The best response was when the premier customer oriented person (director of operations) of a very large firm called me to pretty much complain that the CEO tasked her with resolving my issue. I had to refrain from laughing. (It was a big problem for me but quite a delicate matter for them I explained in kind writing.) She was telling me how happy I should be that she called me. I told here thanks for calling but you should be happy this isn’t in the papers. End of kind call, start of solution.
Send an email/letter to their legal department asking for help to resolve the matter, if they can call the PO department and resolve it, and say its been 6 months and they are in breach of contract. Be nice.