Help! My clutch slips!!! (A3 8P)

Hello I had a chip tuning done by Abt about half a year ago (1.9 TDI PD on 96KW). A few weeks ago my clutch started to slide. Abt takes over the warranty here, but my friend says that this problem might occur again and again, because the clutch is not designed for this power. He recommended that I go to Abt again and let the torque be taken back from them. Does that make sense? Can you determine if there is not an F Is there any experience of such problems here? Harry