I'm sorry you are having issues, I went 6MT due to the issues I have had with every DSG car I have driven/owned, I had an 08 R32 which had the mechatronic replaced and I never got rid of the shunting feeling in low speed traffic when the car was warm, I have had several loaners an A3 TDI with DSG and a mk6 golf that have not changed my opinion, but of course these are all 6 speeds so a different box than your S-Tronic. I have issues with inability of DSG to make smooth progress in slow moving traffic and the multiple gear downshifts.
I hope they take care of your gearbox. Usually they reset the computer and it works perfectly for a while after that, hopefully they don't have issues deeper than that, clutch packs etc.




