If you Google the United States Embassy to apply for an on-line authorization (ESTA) to visit the US under the Visa Waiver Program, you should be aware of a number of websites that offer to get your document for a fee, typically $49.99. They look official but are unauthorized agencies with no connection to the US Government.
The official US Government site is
here. The on-line form is easy to complete and, providing everything is in order, you will get your document within twenty-four hours. The cost is a mere £8.00.