Nalin,
Sorry to hear about your issue.
Just to clear this up a little for the rest of the readers, there are NO hiden costs/discounts included in any of the 'Consumer Focus' accredited comparison sites.
All discounts are included in the calculation and will be clearly highlighted on the details tab for each product which can be found by clicking through from the results page.
In relation to a discount of this nature, the only product that springs to mind is from Npower. This is a significant discount (approx. £105 per annum) which is offered to customers after they have been on the tariff for +12-months.
Whilst I agree consumers need to be aware of these products/discounts, it's unfair, and untrue, to say comparison sites are misleading.
Any suggestions on how to make this information more transparent will be welcomed.
Kind regards,