Just an additional followup here.
Does your chunk code contain the wrapping div information? If YES, try removing the wrapping div and putting it in your template page such that your template page would look as shown below. (note: this would essentially be a hack to possiblby resolve the issue.) Until the magic quotes issues is resolved or confirmed to be OFF, you will have issues elsewhere in the site where ever you attempt to insert quotes in your chunks. )
bigredphone class as well, located at the top of your pages, is also affected by this and not displaying properly.
<div id="address">
[[$YourChunkNameHere]]
</div>
If these two chunks—for your address and your big red phone— contain the wrapping div code, then something has occurred either with an update or change to your server or MODx that has messed with the magic quotes setting causing those backslashes to be generated.
Again though, if you have successfully turned off magic quotes, try clearing the MODx cache first, as this may just be a cache issue. You can also manually clear your cache using the hosting panel file manager or an FTP application by navigating to the core > cache directory and simply delete the contents of the cache directory. (note: This method is for MODx Revolution sites).
What's is Magic Quotes anyhow?
When ON, all ' (single-quote), " (double quote), \ (backslash) and NULL characters are escaped with a backslash automatically.