Shocking Service with no feedback - car in for almost 4 months already

In August / September 2017 My car (Golf 7R - 2015 Model) went in to Lindsay Saker Kempton Park to fix a coolant leak (warranty repair). When I got it back there was a problem with the radiator fan that will not turn off and I booked the car back in to have it resolved. The dealership returned my car the same day but the issue still existed and was not solved. I booked my car back in during middle of October 2017. Its now well into February 2018 and my car is still at Lindsay Saker Kempton Park (almost 4 months). I have escalated this to VW Head office who assigned a case manager to monitor the progress. It's got to a point where I am no longer receiving any feedback unless I make the calls - only to be told that the problem is still unresolved and they are not able to provide any information on the way forward to have the issue fixed. The "Customer Service" from Lindsay Saker and the VW Head office leaves a lot to be desired and its unacceptable that my cay should be in the repair center for almost 4 months with no view of how to have the issue resolved.