Hello Pasumarthy,

You may search for the term "Churn" or "Customers Churn".

Also, It is not that much hard to build your own survey... Apply it on your local context.

Good Luck

thanks a lot Hossein Olya sir 

from phani

Framework of Study in the "Factors Affecting University Student's Attitudes toward E-Commerce: Case of Mu'tah University" is good,- article enclosed

Please check with them

www.ccsenet.org/journal/index.php/ijms/article/download/30491/17979

Dear Krishnan sir,

thanks a lot for kind reply