Important: convertible note maturity extension

I've been trying to resolve this on my own but I'm stuck.

convertible note maturity extension. I've been dealing with this for about 11 weeks now and the situation isn't improving.

I have already tried to resolve this directly but did not get a clear answer.

Do I have a strong case? What should my next steps be?

I've dealt with this before.

I eventually got results by escalating/manager. It took 1-3 months but was worth it.

This happened to me too. Have you tried filing a complaint with the relevant agency? In my case they investigated and it got resolved without needing a lawyer.