I took b2c whitelevel website from easemytrip.com and I have been cheated by them

I am travel agent who took a b2c whitelebel website from easemytrip. I am fed up with easemytrip as from the 1st day there are numerous issue starting from slow loading of website, transaction fees and much more. I have mailed them minimum 200 times but they dont solve my problem.They have cheated me.I am getting defamed to my customers who are trying to book tickets from my website as they know my name but the technology behind is given by easemytrip that they dont know.I want my money back from easemytrip which I payed to make the website.