Welcome to our forums and thanks for you post.
Our Engineers will always do their best to work with you to get things up and running and installed exactly the way you want them. However, it is at their discretion as to how your cabling is installed as sometimes they don't have the necessary tools, or may believe it could affect your services in the future.
As mentioned previously, if it's a case of where you just want the wire pulling through a single conduit pipe, you may wish to complete this bit of work yourself. For added comfort, it may be worth getting a Technician out to perform a site survey - the downside to this is that it can delay your installation.
I'm going to pop you a PM to get some more details regarding this. Please look out for the purple envelope in the top-right of our forums.