Adobe Not Original [Non-Genuine software]

You didn't purchase CS5.5 from Adobe.  So your issue is with CDW, not Adobe.  If CDW is still in business, contact the vendor.

Creative Suite is no longer sold. Adobe discontinued it in 2017.

MODERN OPTIONS:
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Creative Cloud All Apps (51 + apps & services) and Single Apps Plans
https://www.adobe.com/creativecloud/plans.html

Make sure your computer meets the minimum CPU & GPU requirements. Most Creative Cloud apps work on:

• Windows 11, Windows 10 versions 21H1, 20H2, 2004, and 1909 (LTSB branches are not supported);
• macOS 12 (Monterey), macOS 11 (Big Sur), macOS 10.16 or 10.15 (Catalina)

- https://helpx.adobe.com/creative-cloud/system-requirements.html

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OTHER CODE EDITORS:
-- Atom (free) - https://atom.io/
-- Codespaces (free, browser-based) - https://github.com/features/codespaces
-- Nova (Mac only, formerly called Coda) - https://nova.app/
-- Pinegrow - https://pinegrow.com/
-- Sublime Text - http://www.sublimetext.com/
-- Visual Studio Code (free) - https://code.visualstudio.com/
-- Wappler ~ Visual Web App Builder - https://wappler.io/

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Beware of fake Adobe reps who may contact you privately offering to sell you software or take control of your computer. It's a scam, run away! Real Adobe employees will never reach out via Outlook, Yahoo, Gmail or Skype.
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3 Easy Ways to Identify Genuine Adobe Staff
https://tinyurl.com/10791730

Do you mean the license was revoked or not genuine software?

That typically happens when third party software companies illegally sell seats on a volume license. Once Adobe finds the terms of volume licensing were violated, they kill the serial number. 

Unfortunately, once Adobe revokes a license, you're pretty much out of luck. As far as I've ever seen, the only option they give is purchasing a Creative Cloud membership.