Unable to send calls or texts

So I am running on Page Plus (VZW MVNO)

I was in my phone's "testing" section (Dailer---> *#*#4636#*#*---> Phone information) and turned off my data connection as I always do, but my screen didn't turn off, so it keyed in a bunch of random stuff into the SMSC section, and maybe other places.

I don't know what happened exactly, but now I can't make or receive anything. Please help, I would like to be able to use my phone ASAP