I have bought iphone & made free apple id from shop, installed whatsapp?

Now whatsapp redirected me to sign in icloud, when i tried with my id it said "too many accounts with this id" please tell what to do to restore in icloud?

Not sure but you can try by making a new account on icloud

Simple enter your username and password
or
if you are making a new account try using a unique name like harnoor2209