Hi Nithin and welcome!
Basic question before registering a domain:
If I were the business, would I buy this name?
And further: What would I be willing to pay?
I see where you were going but the double F for me destroys the appeal of it.
Made up domains have their secret in being catchy and remarkable.
Of course you don't have to be Einstein to remember your name but it just lacks a bit of sexyness.
You will always have to explain "Yeah, like Cold Fee with a double F".
Hoping that doesn't sound harsh as it's totally not intended to be but I can't see a bigger value here
unless you develop something on it yourself.
Best of luck and enjoy your time here! Cheers!