So I tried to change my plan using the self serve, no luck. Kept getting an error that said try again later. Its a promo rate that expires today, so I tried calling. I got a rep who made the change and said I should get a text message to confirm the change. That was about 8 hours ago and I haven't received any text message on either of the lines I changed. Of course I haven't been able to get through to ask, but how long does it take before the text is sent? If something went wrong with the change and the promo isn't applied, can customer service fix it after the promo has expired, like tomorrow?