Hello Parveen_ambika,
Welcome to the community!
Sorry to hear you wish to deactivate your SIM. You should note that the forums are community-driven and are not intended as a venue for customer services. We wouldn't be able to cancel your services for you. While there may be some moderators still willing to provide assistance via PM, you will likely need to contact customer service so they can cancel your services. In addition, they can also be contacted via Live Chat, Facebook, or Twitter. Those methods can be accessed via the contact page posted above.
Hope this helps 😀
Cheers
