Renault Silverlakes worst service

I Took my 4 month old Renault Kiger if to Renault Sukverlakes because if an battery light on my dashbiard and a nitice tha says stop immediately. It has now been a week later and the car is not yet fixed. On thursday the 7th July they gave me a call ti say I can pick up the car but will need to bring it back on Friday to have some oictures take fir the warrenty clain as they had to replace the altenator. I declined and said that they should keep it and let me know when the pictures for the clain has been taken. On Friday 8 July they phoned me to tell me rhe alternator is now on back order and can take up to 3 to 4 weeks to get. This is unacceptable since it is a differnet story to the day before. I think that their service is parhetic and unprofesional give that in 2 consecutive day I have been given 2 different stories.