Default Just got my 5 yesterday... problem today

So i traded to a nexus 5 from my gs4. everything was good yesterday buuuuuut.

today, and i dont know what time, i havent been able to make calls or texts. everything else works.

called customer service, walked me thru some troubleshooting... no luck
went to the store, they tried doing some stuff, took out the sim and put it back in. worked for a sec. then no workie.
did a factory data reset, same deal. cant call, get calls or text.

i get this message when i call my phone or try calling from my phone "we could not complete your call, please try again"

its weird it will off and on let me call out from my phone. but cant get calls or texts

going to the store where i got it tomorrow.

anything have something similar happen?
Sprint - Google Nexus 5

ROM: PA

"don't chase imaginary butterflies into something highly illegal"