I have a 07 plate PD170 VRS estate. It has had injector recall -done before I bought it.

It always seems to drive rubbish <2000 rpm, mainly shows up at 1500-2000 rpm the call feels hesitant, does not accelerate smoothly, although it revs fine. possibly feels down on power.

Above 2000 rpm its like a different car, very smooth plenty of power.

Also now and again, at idle say at traffic lights etc, sometimes the car seems to hiccup, the revs seem fine but the car feels like its been given a tap from behind or something- very odd.

has recently had a oil change/ oil filter/air filter/pollen filter/fuel filter but was doing before this

injectors probably haven't been set up correctly. If shark performance are vaguely near you then speak to them. They do them often.

Shark are about 15 mins away, when you say they are not setup correctly, are we talking physically or some sort of Vagcom/coding setup?

mechanically. It can be checked on VCDS from what I understand, but it is a mechanical adjustment.