CRE loaded online store with payment module and programming

. I'm looking for an expert for this project and for any upcoming changes. Our CRE loaded store that was upgraded form 6.2 to 6.4 I had a new template reapplied but have issues with functionally. I also need the check out to have be PCI complaint with a new payment module and I also need the check out to reject orders under a certain amount. I also have minor appear changes. I have a list of these changes. I need to be able to verbally communicate as well as email. I have a back up copy of the online store at our host from July.