Decrypt Sookasa Files

Sookasa has a large number of important records encrypted from my business. They closed down over a couple of months and never had anyone you could speak with directly when their tacit email directions did not perform as stated.  I hope there are others with locked up files who could support some type of class action legal remedy. I dont think they allowed enough support to accommodate their clients.  I was working on the road last spring and didnt have the band width to permit me to download the large files I have to a local computer , which was neccessary to do in order to decrypt . There was not decryption offered to work within Dropbox on line. DROPBOX should have been our advocate to allow us to decrypt files in the cloud,  which was offered in the large business category.  I spent days downloading files local , decrypting and attempting to re-upload.  I never got through it in time. ( 10 years of files.)  I WANT MY FILES BACK.