Videocon Industries — sub change of customer name

Sir / Madam
My customer ID is 28770645 and I purchase this videocond2h from my cousin brother which is registered in his name and I want to registered my name Mr Shankar Dey instead of Mr Biman sarkar please solve my problem as early as possible

My postal pin code : 783370
City: kokrajhar ward no 1
District: kokrajhar
State : Assam