Expert in Online payment gateway and consultaion on lowering commision cost

We are looking for someone who has a lot of experience in working with different Online payment gateway and who we can consult to lower our online payment commission charges. At the moment we are using PayPal to process our card payments online which over the year is mounting up to a lot of charges.

We need some advice who has worked and understands the different Online payment gateways which are available to UK customers and can really advice us how to save cost for us in the long term. We are looking for an expert in this field who can save us a lot of commission cost when processing card payments online - only looking for TOP CERT individuals with high review rating.