Before we can do anything to optimise, maintain or re-host your website, you will have to make sure that you have the name of your website's hosting company (not the same as your website's builder unless they provided hosting as well), and your access details (username, password, etc.) to the hosting account. You should have these somewhere if you set up your hosting account yourself, or these should have been given to you by your website creator who organised your hosting set-up originally. If not, you will need to get them from your website creator - they are yours - you are entitled to them and you paid for them!
These details are essential but if you don't have them to hand at present, still contact us for a preliminary chat as we will be able to explain the details much more clearly and help you by answering any questions.