I just changed my plan and I can't text or make a phone call. I've already shut the phone down as we

[Dunkman]

@Pchelsberg 

More details would be helpful.  Did you change your plan immediately or at next renewals?   Is your plan status active or suspended?  Was money taken from your bank/credit card?  

Maybe try the lost/stolen phone trick.  That seems to reset your plan/account.

To report your phone stolen.  Login to your account.  Choose Plans and Add-ons tab. Then choose Lost/Stolen Phone tab.  The choose Suspend Service tab.  Logout.  Wait few minutes.  Login in and report your phone found. 

[GinYVR]

Did you go for a cheaper plan and get it to change on your renewal date? If so, only the moderators can fix the issue for you. Click on the ? on the lower right hand corner, talk to SIMon the bot and type in submit ticket once you think it understands your issue.