johnnie davis none They are trying to get more money out of my bank account that was not authorized

I purchased a bottle of extreme fit 180 and received a bottle.  Today 7/23/18 I was checking my bank account and noticed that the company was charging me again for $79.95 for more.  I did not authorize this and was not informed that they would be charging me again.  I only wanted one bottle, which I received. I tried several times trying to reach them by phone, but always gettingthe same  message to leave my name and telephone number and someone will call me back, but to no avail.  No response from company.