Useless customer support from Adobe...

I am trying to get some information from Adobe. Our company credit card is still getting charged three (3) subscriptions to Acrobat which cannot be utilized. We can't use them because we do not know the email and sign-in information associated with them. The previous managment team (it was a new company then) allowed individual employees to establish subscriptions for Adobe Acrobat using their individual employee emails rather than a centralized email such as 'purchasing@company.com'. Those employees left the company when it was restructured a couple of years ago. The IT company which managed our emails back then went bankrupt a year and a half ago, so the former employees' archived emails no longer exist. Long story short... we need for adobe to provide us with the email addresses/accounts associated with the 3 subscriptions we are being charged for so that we can cancel those subscriptions and purchase new subscriptions under a central email. I have followed Adobes links and suggestions but to fruitless avail. I keep getting circled back around to yet more useless links and advice. As much as I would hate to do so, I feel there may be no other alternative than to have our card company block/deny those charges. Adobe can then send out all the threatening emails they want demanding payment but that would stupid an useless since nobody knows what emails are attached to those accounts and, even if we did, those email accounts no longer exist for us to get Adobe's demand for payment. Can someone please provide us with a direct email address or telephone number to an actual living (and reasonably intelligent human) who can provide us with all emails/accounts associated with our company's domain so that we can cancel those subscriptions in a pleasant and business-like manner? This has issue gotten beyond ridiculous, as has Adobe's useless customer assistance.