I'm with Vert and Trofeo on this one. You need to find a proper mechanic.
I've replaced starters on a range of vehicles and while they're all pose unique access issues, and require a bit of dexterity and patience. But none can't be done with motor and transmission in situ. I've just reviewed the manual for the Mk6 1.4 and the process is similar between the manual, auto and DSG. All tools required are going to be found in any reputable workshop too.