IMESSAGE blocked due to "SPAM"

My imessage feature has been blocked for the 2nd time due to "spam" and I have no idea what spam they are talking about. I've never sent any spam messages to anyone. Now support is saying they can't unblock it, tell me who spammed me, or what messages were considered spam. The only way to regain the imessage feature is to change my number they said. Why in the heck would I do that if you can't even tell me what got me here in the first place. Am I supposed to keep changing numbers every few months?! Has anyone been able to find a solution or get a resolution for this type of issue?