How to tackle this tricky situation with SENCO?

I am hoping you could all offer me some advice.  My daughter is in a mainstream high school and really not managing.  She was diagnosed while at primary.  She had an EP assessment a couple of months ago with a view to the school and us as parents making an application for a EHCP.  The problem is, the SENCO seems reluctant to know provide us with a copy of the report or the deatils of the EP so we can request a copy directly.  We have asked verbally, both face to face and over the phone and also emailed the SENCO several times.  (He ignores the requests and responds by talking about other issues to do with my child).  What is my next move?  Thank you in advance.

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