Sudden jump in my monthly price

I am an AT&T prepaid member. I have 3 lines bundled together and have been paying $90 a month for nearly a year. Before that, I had 2 lines bundled together, and was paying $70.

All of the sudden, my autopay alert text notifies me that my autopay payment was $115, and I have NO idea why. There is NO explanation. Nothing was promotional.