Sony India — service centre not ready to take the laptop for replacement

Address:

Mumbai City, Maharashtra

I ve purchased this laptop 3 months back, 3 times problem had occured and 3 time i have given this laptop in sony service centre. problem in laptop was, sometimes it gets switched off and doent gets switched on for 2-3 days. service centre had reinstalled OS and formatted also still the laptop was getting hanged and working very slow. Again i m facing same probem and i have requested for replacement of the piece. the service centre is not ready to take the laptop for replacement instead advising me to go to main Andheri branch. Please help in this matter.