Um Motors — servicing and delivery issue

Address:

400708

I have given my um motor bike for 20 days back and received in 3 days. Very next i gave my bike back to the servicing centre because after servicing my bike stops everywhere continuously. Now from almost 20 days i am following with service dept o[censored]m motors at rabale service centre but i dont get any satisfactory reply. They say we are awaiting some parts and will take more time. How many days more should i suffer because of there bad service and response. Please take proper action against the service and sales rabale - navi mumbai store.