My phone uses excessive data 0 I have a sansung s7.  It is gobbling up data.  I've disabled as many programs as i dare from running in the background but no help.  Is there anything i can do about it?
That's not good to hear! If your Samsung S7 Edge is rooted then I would suggest running an application such as AFWall+ and setting custom rules to block applications communicating to web-servers etc. 

You did not mention how much data you have to play with, but you could go ahead and install an application such as 3G Watchdog to view what applications are using an excessive amount of data. (This can also be viewed in Settings --&gt; Data) 

I would suggest you ensure your accounts are not set to sync frequently, and that apps are not updating over 4G.

Lastly if that all does not help, here are some good forums:

Android Authority - Android OS destroying my Data!

Samsung Forum - OS Application using extensive data

Reddit - S7 Edge using heaps of data

All the best.