get "serial number has been revoked" when trying to install InDesign CS6...

Issues of product activation, registration, serial numbers, etc. cannot be handled on these forums.

Whoever you spoke to at Adobe Customer Care improperly sent you to these forums. Please call back indicating that this is a serial number / activation issue. If the representative still won't assist, ask to immediately speak with a supervisor or manager. They should be able to clear up what the issue is.

There is no time limit on support for serial number / activation issues on perpetual software licenses.

You didn't indicate where and how you initially licensed the InDesign CS6 software from (Adobe directly via Adobe's website, a third party, eBay, what?) That having been said, there have been term licenses sold, often in corporate and academic environments (and often with the recipients not told about those limits by the organizations that obtained those licenses from Adobe). In some cases, vendors who are not Adobe Authorized Resellers have been known to illegally sell pirated or “unbundled” serial numbers from bulk, volume licenses designed for use within a corporation. When such serial number use is discovered, Adobe may deactivate any users using such products activated with same. That might be the issue or perhaps some system glitch. But this has to be resolved by Adobe Customer Care.

          - Dov