I need a web developer to troubleshoot our database

We have just changed hosts from WP Engine to A2 Hosting, to a dedicated server, and since then our website has been down (6th day now). Their support tells us that the database is maxing out the CPU and putting a very demand on the server. They have given us some more specific details which I can provide later. We urgently need someone to delve into the database and fix the website, get us back online again!