They send an auto-reply automatically, if you didn’t get that either your emails to them, or their emails to you are ending up in a junk filter. If that’s happening then posting here will let them know there is an issue.
If you did get that, then they’re working on the problem and will only respond when they have new information. It can be frustrating to think you’re in a black hole - but they are working on it.
Sending multiple emails will literally slow down their response time because they have to find all the tickets the emails start, determine that they’re about the same issue, and close them before they can respond to the initial issue.