DSG issues, paddleshift fault

Hi all!

Hopefully you can help. Having some intermittent issues with the paddle shifters on my 2012 Octavia Cr170. The best way to describe this issue... 

- Rare days I can use both paddle shifters, say once every gazillion blue moons. The up shift never seems to work. However when it does spring to life, it works fine for a good couple of days, then nothing again. 
 

- Most days I only get down shift. Down shift works fine pretty much all the time. 
 

- On a rare day, I’ll get nothing 

Today I’ve discovered that if I hold the up shift button (trying all different tactics to see if it works, to no avail), it disables the down shift. So neither of them work, until I restart the car, then I just get down shift back...
 

Can anyone shed any light on this? I’m sure the obvious advice is get it plugged into VCDS by mister mechanic but I was wondering if it’s happened to anyone and if there is a simple tool that could reset something of some sort? 

Many thanks in advance!