Anyway, From what I know it is just temporary and after XX days, your account will go back to normal.
EDIT:
It seems I was right. Read this: https://telegram.org/faq_spam#q-what-happened-to-my-account
And this is the worse part, you'd be able to access your account on the next day and there is no way to create an appeal because the ban is just temporary. What if you need to do necessary messages thru telegram? Then you need to wait XX days, for the market is too volatile we can't wait that long. Like the author, I was also a moderator and I didn't send message to people whom I don't know or spam on a TG channel because i've done it before and learned my lesson. Hope that telegram would notice this kind of activities : reporting without support for the said report.