Magento Payment gateway integration

General information for the website: https://www.payzone.co.uk/card-payments/online-payments/developer-support/direct-integration/
Description of requirements/features: Hello, We are looking for a freelancer who can integrate Payzone payment on our Magento ver. 1.9.0.1.

https://www.payzone.co.uk/card-payments/online-payments/developer-support/direct-integration/

Looking forward to receiving replies from the freelances who did this in past. Please don't bid if you don't know how to integrate this because already a few developer wasted a lot of time.
Payment methods: Credit Card, Specific Payment Gateway
Extra notes: General information for the website: https://www.payzone.co.uk/card-payments/online-payments/developer-support/direct-integration/
Kind of development: Customization of existing website
Description of requirements/features: Magento Payment gateway integration
Payment methods: Credit Card, Specific Payment Gateway
Extra notes: