I am so grateful for your responses. I have been going crazy trying to get things sorted out.
The original quote was for a professional bespoke e-commerce site that would be easy for me (green as grass) to handle. This quote was given and accepted in April. Last month, the web chaps said that I would get a lot more functionality with OS Commerce and that is why they wanted to use it. I mentioned that it was supposed to be a bespoke site, specially written as per their quote. I was told that they were the experts in their field! I have been told the site is almost finished and someone is supposed to be coming tomorrow to train me how to use it. To me, the site looks a mess, and compared to their handiwork, my 'shop in a box' looks first rate. If it is allowed, and someone will have to tell me if it is okay, I can let you see what they have done so far.