Catwalk — bad purchase of shoes

Today i have purchased a catwalk shoes from shopper stop city centre 1 kolkata. When i m going to use the shoes it start paining in my fingurs and i can't walk properly. This is my 1st purchase of catwalk shoes and the experience is so terrible.
Now it is my kind request please give me some way out to solve the issue and i am very sure that next time onwards i will be sceared to use the shoes again. So kindly suggest how my purchase give the value for me as well as you.