They should not be taking that approach.
Knowledge base article (Doc ID tn_18759) - Download and install trials - includes:
Technical support for product trials
Adobe offers complimentary, phone-based support for installation issues only. For telephone support information, go to Contact Support and Customer Service.
So I think that your best bet would be to call them again. If you get the 'no support for trials' response:
- Get their name (most call centre operatives will only give their first name but that, together with a date and time of the call, is sufficient for Adobe to identify the operative).
- Point them at their own technical note - article (tn_18759)
- Inform them that you will escalate their refusal to assist, even though their technical note says they will, to a higher authority.
The biggest problem will of course be to find a higher authority and there I'm afraid you're stuck with the Contact Adobe button Steve has pointed you to.
It seems a shame that, after the very public Adobe CEO statement in 2009 recognising their cr*p support, that things have not improved.
Insanity is hereditary, you get it from your children