I only email my exs attorney when his spousal support is due and just wait to see if my ex sends his pmt ito me
My ex's attorney was just as obstructionist as your ex's attorney appears to be. It's very frustrating.
I battled that by repeatedly making voluminous filings with the court every time my ex's attorney ignored me.
Every time he had to read numerous pages of my own legalese and responded to it through the court he would end up charging my ex another $1000.
Finally, after almost two years of this, she choked on her attorney fees and settled with me. I came out rather well.
If you want to get your ex's attention, make your motions and filings with the court. The lawyer will have to read it and charge for it, answer it and charge for it, maybe appear in court and really charge for it. Your ex will get the message sooner or later.