I am currently on a $40/month plan and was sent an email about a rate increase to $43. I was also offered a $45/month plan with 2GB. I responded 2GB45 to a text number, as directed in the email. The confirmation text I received indicated that it would be processed within 7 days. It is now beyond the 7 days and it is still not activated - was this a legitimate email? Or do I need to do something special?