Repair on electronic defect 6 weeks and counting

My Range rover was booked in on Tuesday 25 Aug 2015 for the appearance of an engine light. Several parts were replaced and 6 weeks later the same defect was encountered. I received highly professional service from Landrover George during this time. however I expect Landrover SA to step in and resolve this issue without further delay. The technicians in George obediently followed the instructions of their computer which indicated various faults and I feel Landrover SA should now take control to prevent serious damage to the much improved brand they have built in the last 6 years.