When your university does not respond to the EMGS prompts, your file becomes inactive. Reach out to your university immediately to ask them to respond to EMGS so that your file is reactivated. No, you do not need to apply for a new val. Just ask the university to reactivate the process.
I’ve never had to ask for such extensions so my experience with it is quite limited. The only thing I know is that if the university answers emgs, the file will be active again and will proceed normally. But, better do it fast.