Need help with current website

I am hoping to find someone who can help me with a website that we had developed. The website is up and running and works. The problem we have is that we need to make some changes to it....add a picture, change some text (employee bios), upload a newsletter so others can download it. We were assured that creating the website with Drupal would allow the website to be edited easily and they said they would help with the changes. Now, they are not being very helpful.

I would like someone to look at the website and give me an idea of how much it would cost to provide some training.