Just to revisit the idea of how to get their attention if you are being ignored. We were at a different stage - ready to request OOD placement - but this is the protocol we followed.
1. Email to IEP coordinator (already at district level due to inexcusable behavior by principal - YMMV) requesting immediate meeting to discuss change of placement. No response.
2. Email to district's Director of Pupil Personnel Services including a copy of email from #1 requesting immediate meeting to discuss change of placement. No response.
3. Certified letter to Director of Pupil Personnel Services including hard copies of emails from #1 and #2. No response.
4. Certified letter to Director of Pupil Personnel services, certified letter to Superintendent, regular mail to both, personal delivery to superintendent's office and email to both, each including copies of prior communications, reference to date and signature of delivery and copy of little green card from #3. No reponse.
5. Hire spec Ed attorney (best in state - someone who I am told strikes fear into the hearts of districts). He sends a letter advising that he has been retained to represent us and requests DD's file. Immediate meeting scheduled. District offers OOD placement.
We found out later that behind the scenes there was all sorts of scurrying to make arrangements for OOD. We were requesting a rather unorthodox placement and they were working on making it happen but superintendent was vetoing the plan so they were working to come up with the alternative that was eventually proposed. We were not told any of this until a year later though.
HTH