Mk1 Technical : Ford kuga oil level rises with Diesel ?

I brought a new Vauxhall combo van last year after about a month the DPF light came on, 20 mins of driving at about 2-2 1/2k  rpm light goes out this happened a few times then left light on for a few days then got engine management light on which wouldn't go out and loss of power. Took it back to dealership was told as I do low mileage ( after 6 months not hit 2500 miles ) take it out once a week and give it a good run for 25 mins .

If car smells hot when you get out take it out for a blast for about another 5 mins as this is when regen is not complete .