this is the first time i am listening to this kind of thing.. coz almost all the cities have Seagte Service center.. and after buying you dont have to pay for the courier charges, its the responsiblity of the hardware vendor to pay for the courier.. and if you have the bill , you can even drag that person to Court or police.. he will be on track after that.. he is simply a thug
i guess , you should ask this question from your hardware dealer , well tell him that you are going to consumer court and you will file a RTI against him.. or else he should change your HDD with New ones..