Discovery 2td5 commercial

Hi,we have a commercial disco 2td5 and a few months back it decided to run away sucking oil up through the turbo.thankfully an air lock stalled the engine hence saving it from going bang big time.we have found fuel in the oil of which we changed for fresh along with the filters.also had the injector seals changed using genuine landrover. Everything went great for about 1000 miles to find the battery dying which is now replaced with a new one(expensive) and found the oil level high again.drained the oil out again to find fuel in it again,nearly double the capacity.once new oil had been done and new battery installed the truck drove well,now today started it up the engine seemed to run uneven and lot of white smoke coming out the exhaust when accelerater is pressed. When wanting to drive the engine seemed hesitant. Checked the coolant bottle and water level is correct.any idea's please.not used to these as had a series for 17yrs towing the trailer.thanks,efrem

2 reasons why the sump fills with diesel ,injector o rings or cracked head

My td5 had a cracked head and with the amount of diesel you on about in the space of time doesn't sound like injector seals