Thanks,
Can any one suggest me other good payment gateway?
I dont want BTC to convert in USD or INR and get transferred to my bank account. I want BTC collect in payment gateway should be transferred to my blockchain wallet.
Then you don't need to use a merchant service at all. If you plan on just accepting bitcoins and keeping bitcoins then depending on what platform you are using there is probably already a payment module available.
For example:
https://wordpress.org/plugins/bitcoin-payments-for-woocommerce/Or if you have a physical retain location you could use:
https://coinofsale.com/