transaction from credit card without permission

I received a call from the call centre for WEBAFRICA. They explained the costs involved re designing and hoisting a web site. I told the person Mahlong that I would think about it and he should contact me the following day and I would give him my answer. That same evening I started getting emails to thank me for excepting the offer. I immediately sent an email to tell them I did not give permission.To date I have not received a response from WebAfrica. its been 4 days. The money has been taken off my credit card as they had the information from a previous transaction. The bank has now opened a ***** case and is investigating. I will get my money back but this is a warning to the public .Don't deal with Web Africa.