Hello!! -------I can help you with this immediately--- I am WHMCS expert having 6+ years of job experience in-
whmcs server modules development, WHMCS and WHMCS addons-modules development, whmcs theme customization , Whmcs payment gateway modules, whmcs re-seller modules development, whmcs domain registrar, Whmcs + iphone app development
Looking forward to your available revert and i will be there to help you out in the best possible way.
Thanks!!