My imessage isn't activating after downloading ios7?

Ever since I downloaded iOS 7, every thing i try to turn on imessage it says "waiting for activation… " for awhile, and when I check back it says something like activation unsuccessful. I heard a lot of other people had this problem as well, I just don't know how to fix it. I have an iphone 4s. Also, my mom turned my phone service off (I got in trouble at school and that's my punishment) so does that have a factor in it not working? But before iOS7, I could use imessage, as well as all the other things besides MMS and phone calls, with Wi-Fi and had no problems. Thank you so much, and I appreciate your time.

Added (1). In the first sentence I meant *every time, not every thing.

It says Apple is working on a patch related to this? Try these steps http://www.justtext.com/messageboards/20131012193838.html

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