Policy Bazaar — denied to cancel my policy

Address:

F1/112, Shiv Durga Vihar, Lakarpur, Nr. Surajkund, Faridabad, Haryana, 121009

I have selected an insurance plan (Hdfc life - click 2 wealth - wop) with 15000 from policy bazaar. On the next day, i dropped a mail to policy bazaar to cancel my policy. This all was done by me before receiving the policy bazaar kit. Now when today i call to customer care department, they told me we can't cancel your policy or we will deduct money then refund rest of the amount.
Please help me to get my full amount.