Initiating a case against an immigration consultancy company

Hi,

I have a dispute with one immigration consultancy firm in Dubai. I have signed an agreement with them for seeking their services two years ago.

However, later I came to know that they have not provided complete information for qualification on the first instance due to which my case does not qualify at all for Canadian immigration.

Now, I am asking for cancellation of the agreement, which they refuse claiming it was my mistake.

Kindly advise regarding the right forum and the way to proceed legally with my case.

Regards,

Mudassar Farooq