Apple India — delay in service

Address: Gwalior, Madhya Pradesh, 474005

My macbook air had a screen problem a blue line was appearing in the middle of the screen, i went to the service centre gwalior on 10th october, they told me it needs the screen replacement i submitted it on 10th of october 2018, i called them again on 27th october 2018 they gave me a faulty message that it was repaired and already delivered then, they placed the order for the screen on the same day as i got the message from apple support and today is 8th november2018, and the work is still pending, i am a medical student and i need my laptop to study.
They are not taking the work seriously please take some strict action against them for this slaking.