Need International Credit/Debit Card Gateway suggestion

Hi everyone!
I'm new to web hosting business and looking for credit/debit card payment gateways . I already have integrated PayPal and Coinbase Commerce however I want to integrate card payment as well. I'm using WHMCS to manage clients.
Please suggest some with cheap fees!

P.s: I've tried Voguepay but they spam a lot with emails, so I won't be looking towards them.

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