Comments for Elsevier paper proof I have just corrected my first paper and I might have done something very wrong.

Using the website provided by Elsevier, I corrected everything regarding words and sentences, in addition to small changes in the equations. But, some changes were not possible for me to do, maybe the website had some built-in prevention. For example I couldn't delete and add equations, and I couldn't properly change the layout of the equations (Some equations were cut in half, and some were longer than the text width), also one of the tables needed some changes but I couldn't do them in the website!

So, I wrote multiple comments for the copy-editor regarding these changes. But does this mean that he will do them properly?

Since I will not have the chance to see the changes before publication. I fear that the copy-editor will not make the proper changes! And I might end up with a Frankenstein paper.

Sorry if the question is silly, but I have no experience in this.
I think it is very unlikely that any reputable publisher won't review your changes and get back to you if anything seems wrong. 

However, if you have contacted the copy-editor, they are also warned that it needs a look. Relax for now, I think. You may have more work to do, of course. 

They likely deal with similar things about once a week (day?).