Janet King review about company Kelly Roofing

I was charged $900 for emergency roof repair. The repair involved nailing tar paper to 2 areas of the roof and the entire repair took about 30 mins. So, I was charged almost $1,000 for 30 mins of labor. I have a written estimate from a second roofer who would have charged considerably less for the same type of repair. I have repeatedly tried to contact Kelly Roofing for an explanation of the charges and not one single reply. As a consumer I have a right to see an itemized invoice showing cost of material and labor. How can a company charge a credit card and not provide any documentation - no invoice, no sales slip, no explanation. How can a company refuse to answer e-mails from a customer that they just charged $900??