Charged twice for the same plan

I've had my phone for two months. I have automatic payments set up, and a few days before I have to pay I get a text from 7535 saying "Your rate plan will renew on [date]. There must be enough balance in your GoPhone acct." then 2 days before I get a message from 28898788 saying "Just a payment reminder, your GoPhone Auto Refill for $40 will occur in 2 days, on [date]." 

On the day of renewal, I get charged twice and both numbers text me saying the charge was successful. The extra 40 is in my account balance, and last month I didn't care because I figured it would just cover this month, but it doesn't matter anyway because that money gets taken out as well as 40 from my bank account, which just put me under again. I need this fixed because this has put me in the hole twice now and I'm sick of these overdraft fees. I tried calling last month and was given a number to talk to a supervisor, but the number wasn't working when I tried calling it.