questions,

Don't back down so easily. Could be that's what they are counting on. If I e-mailed the principal, principal would never respond. If I questioned this, I would get a good natured smile and diatribe on spam filters and a pat on the head. "Now go out and play".
Call and leave a message with the school secretary. Make it clear that you want a meeting. Get your tester involved if that would help. If your request is ignored go to the district. You might be surprised at how receptive the superintendant can be. Or not, but you'll never know unless you pursue it.
Keep smiling, keep calm, keep professional and friendly. But don't just stop asking for accomodations.
I'm in a similar boat with DS5 in K. I was supposed to hear from the social worker 3 weeks ago! I've left 2 messages from principal so far. I am busy hatching my next devious plan. I'm not sure what it will be, but it won't entail leaving it alone.

Incog