Jeep Grand Cherokee leaking oil

advised to change rocker cover gasket this we did still leaking oil (marking territory) sadly my lil girl is still sick, turbo replaced less than 1000 miles ago, a/c flap stuck sorted by cutting away panel behind glove box, had many probs after gear and engine flush, inc over heating, this sorted with coolant change, still leaking oil, MOT fail due to oil leakage over brakes etc, poss crankshaft leak??? please guys help this lil lady get back on the road been a year and pennies are tight xx thank you