charging more than told over the phone on Credit card .

On Jan 7th about 5 pm. I called in to order a pizza.At the Hudsonville ,Mich. location on Baldwin .I ordered an 8 corner . A young lady took my order .I was told the cost would be 17.99. She told me she had applied a coupon already . I told her I wanted it delivered . and she told me that the Delivery charge and tax would make it  25.15 . I asked  her again thinking that was a pretty large amount for delivery .I the nlooked a few days later at my on line banking and it showed I was charged  30.00. We have had this happen before but not this bold  of fraud