So im sure if you google how to burn off dpf there will be plenty of ways
From what i know
1. Using vcds you can start burning off procedure with takes about 30 min and you car will be iddeling at high revs
2 . Constant speed driving , 3rd or 4th gear around 2500 rpm for an hour or 2
But i know this from reading so dont take this for granted . Also you can remove dpf with will eliminate the problem for good.
But best is to google and see what you can find