If it is something like a 'crash course' then maybe however if they are guaranteeing a pass in 2 months then I believe there is something fishy going on.
You can perhaps call official helpline on 0800 0154245 .
Please bear in mind that if they provide you a certificate in illegal means and if HO suspects it, your certificate and your application will be invalidated unless you retake the test and pass in 2 months.
Regards,
E Fidan
Administrator