Some of the relays are at the drivers feet.
You will see a 'circuit opening relay' that control the fuel pump.
There are also some relays behind the battery.
Alternative ways to stop it are to unplug the 'circuit opening relay' or the AFM plug, as both of these will stop the fuel pump operating.
Before you take it anywhere, double check EVERY plug/connection/wire you undid, make sure its all as per beforehand.
Make sure all the earths you took off have been reconnected.