Seat Ibiza all the fault light came on and i lost power

First of all you will need to determine where the oil has come from , whether the engine or power steering or even injector leak . Check engine oil and coolant level . Dependant on level of service that was carried out and what was done , hard to say if related . If engine fault lights still on , you will need to get it scanned for codes . Certainly not safe to drive in that condition .