Secure server set up and fix

Our server is a real dogs dinner SSL wise and we are not getting any meaningful help form the server company who installed it. It seems to have been setup to do way more than we wanted, we have a fairly straightforward wordpress site on it and to be honest we don't even need it to be that secure, yet the way it is set up now it won't even show on lots of peoples browsers. It has a dedicated IP address. We need someone to turn it down a bit so its not so damned secure everywhere. We will only look for experienced freelancers for this job with decent reps so if you don't have the rep, please don't respond.