Maruti Suzuki India — Complaint against R D Motors tezpur

Address:

Sonitpur, Assam, 784001

I went to r d motor, tezpur to buy a swift vxi from the dealer. There was rs.10000 cashback on this model. But they didn't want to give me the cashback amount and forced me to install some accessoeies which is not neccessary for me. They told me that if i don't want to buy this car from the dealer i can choose onother dealer. They said i must have install the accessories at the dealer.
Now i want to ask that is it neccessary to install the accessories at the dealer or they have to handover me the amount.