Iphone won't connect to carrier, computer or turn off?

I do this thing with my friend where I send her a rediculous amount of spam messages by punching random letters and sending them to her iPhone 4 over iMessage. All of sudden they switched to "sent as text" and now her phone won't connect to her carrier Rogers or Wi-Fi. I can't open her settings on her phone to find the problem and she can't turn off her phone. Other apps open but the apps that require internet won't work. Please tell me there's something I can o and I didn't break her phone, I'd rather not have to buy a new one.

Added (1). I've spammed it before and this has never happened. Her phone has been doing this for about an hour

Can you reboot by holding the on/off button for a little bit?

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