Hi yes thanks i was able to do that but after i entered the gate C ive been stuck in a loop, can i know where to go or what to do after that?
Service shop is the large hall with several derelict submarines and a large portal crane on on the ceiling of this hall.
There is two working terminals, one is controlling the crane, and second is used to start the software update when your submarine is in right position.
If you're completely lost, you can teleport to service shop using the cheats menu in the main terminal of the submarine. It's the 11th point.