Vodafone India — Sim card deactivated

Address:

700106

Hello. I am using this no. [protected], however it was switched off for some time . When i switched on my number i found that My sim has been deactivated. And someone else is using the no.My no. Was a prepaid connection. It was linked to many business contacts .
I want to reactivate my no since it is important for me to retrieve this no.I have been trying to contact Vodafone since long but no solution was provided.
Please look into this as my Whatsapp and other apps is linked to that no.
Without that, access to all of it would be a problem!

Please find a solution to this.
This is highly unfair.