Well update. Although the online support told me that the spare parts would be available. The reality was the service center did not have the any option but to reject, as the dell was not providing spare parts for the model.
I had my laptop (inspiron 7559) bottom panel (Only cosmetic changes) replaced by a local repair shop my device case broke down due to hinge issue in the laptop and had it replaced through dell earlier but only lasted for 6 months, would an authorized service center provide me with spare parts. I'm currently looking to replace my battery and bottom access panel.Would the service center refuse to provide me support/after sales service because of this?
Does dell authorized service center support devices serviced by local repair 
shop?