Good evening gents

I have an 51 plate audi a3 1.6 and driving home tonight along the motorway was absolutely fine. When I got to the end of the motorway I came off and upto a roundabout. Down into third to accelerate out and instantly my car started to feel sluggish, struggling to get above 3500revs in every gear. No engine management light on and car continues to be sluggish on acceleration even when not moving anywhere

Any help would be greatly appreciated? ? Audi have already ripped me off before.

Thanks