Poor Service from Renault The Glen

I took my car(Renault Megan GT Sport) in for a service to Renault The Glen on 8 Feb 2018. I advise that I need a service, the right front window is making a noise when opening the window and also indicated the accelerator pedal is making a noise when releasing it. The service adviser advised that the card does not need a service, they advised that they lubricated the window and had to order a part for the accelerator pedal . However on receiving the car back the window was still making a noise. I contact the dealership and left a number of calls for them to contact me back. This is more than a month and every time someone say that they will contact me back but never do. This is the worst experience in customer services I have experienced so far. The service light is now on, the window noise is worse and the accelerator pedal is still making a noise. And still they refuse to contact me back. Job number = 511012