Mahindra &mahindra — cheating

Respected Sir,
This is to inform you that I am running taxi/tourist center .I am owning 4 vehicles all of mahindra made.I am very sorry to know that I have been cheated twice.
Details of my vehicles
1st Vehicle
Mahindra tourister 11 seater
Vehicle no-KL-1-1863
Chassis no-MA1HB2GEA63H26245
ENGINE NO-GE64H63150
Date Of Delivery-19/09/06
2ND Vehicle
Mahindra tourister 11 seater
Vehicle no-KL-31A-1178
Chassis no-MA1HB2GEA73H32791
ENGINE NO-GE74H50265
Date Of Delivery-19/03/09
3RD VEHICLE
Mahindra tourister 11 seater
Vehicle no- KL-31A-7760
Chassis no-MA1HB2GEA93B10456
ENGINE NO-GE94A22022
Date Of Delivery-17/04/09
4TH Vehicle
Mahindra XYLO(E4)
Vehicle no-KL-31B-2395
Chassis no-MAIYA2BVN92L27130
ENGINE NO-BV94K67575
Date Of Delivery[protected]
In the 3rd vechicle(KL-31A-7760) when bought the vehicle muflier was leaking and was promised by TVS sundram (allapuzha) showroom that it will be changed after 1st service but even after the last free service I have not got it changed.
In the 4th vehicle (KL-31B-2395)I promised a center locking with remote control.they said it will be given to you after 1st service but I have not got it yet.After the 3rd service they told me that it was not offer xylo(e4).I have cheated by especially ramachandran(sales executive)of tvs sundram allapuzha.
In future if this problem is not solved I am not going to purchase any more vehicle of Mahindra and not allow any my friends or relatives to do so . Before 5 months there was a offer running that if you make Mahindra vehicle sell you will be gifted with a gold coin.but I have not received it yet.
Regards
Sree kumar .g