Vespa — Extra labour charges for purchase of spare parts

Today, i went to purchase spare parts of vespa byk for my friend at Radar motors dealer code INS4TLR170. I took spare parts and got bill of 2448.00. They have charged labour charges for purchase of spare parts..I thought it was mandatory of labour charges for purchasing. I kept signs on three papers where they asked to keep on the bill as i was important work and in hurrry.
After coming home i saw the bill.i was shocked to see that for the parts i purchased they billed and made as if the vehicle is repaired there. They asked the byk number for checking model and made bill on that byk number..it is totally deceiving.

U can check the cc camera in that shop for confirmation that byk is not there.byk in warangal but billed as if it is repaired in hyderabad for purchasing spare parts.
Please take action on dealer and cancel dealership