We had a very bad experience from this company (CANADIAN VISA EXPERT) (http://www.canadianvisaexpert.com/). The company is a fraud one.
Their operation is through the phone. The team will contact you over the phone and will promise you VISA and immigration to Canada. Same sitting, they will collect your personal details.
After a nice chatting, they will collect your credit card details and charge you heavy fees for the processing of your papers. After few days, you might receive few phone calls from their customer service. Then they will disappear forever. From this level, onwards, you are certain that you lost your money.
Beware from this fraud company. Please pass this message to your friends.