Cannot open/edit old files since ending subscription

I am absolutely furious with Adobe support for misleading me. I have recently retired after using Adobe products and paying for them outright and then through subscription for decades (back to Pagemaker in 1989). When I chatted with TWO support people about my subscription and needing to cancel it (INDD, PS, AI, ACROBAT), they both assured me.... and I asked multiple times.... that I would still be able to open and work with my old files if the companies that I sold my company to at retirement needed my help with anything.

Here I am today, trying to open a file using INDD that still resides on my hard drive, and every time I try to open it, I get the window saying I need to pay for a plan. When I close that window, the file window that I just tried to open, closes down. I sold my design firm to two other firms based on location (northern US clients went to one company, southern clients to another) with the understanding that I could troubleshoot any issues they might have with files.

Now, despite those two support people telling me I absolutely would still be able to do this.... I cannot. I also tried to open files in Photoshop and Illustrator with similar results. I can open them, but I cannot do anything with them; I can't save, save as, export... NOTHING.

I always hated the subscription model, but Adobe gave us no other option. 

I want Adobe to stand by what their support people told me I could continue to do with software that still existed on my drive.