Vodafone India — Disturbing calls

Address:	Kolkata, West Bengal, 00000
Website:	vodafone

On 26.05.2017 i applied duly for a port of my connection (No.[protected] from vodafone posy-paid to bsnl-prepaid service and as such submitted my address-proof, pan card, photograps as well as the duly filled in application form at lake_town bsnl office.
After that every now and then different callers are calling me from different numbers wanting to know the exact cause of my porting out and requesting me to opt for other alternative plans. Everytime a new person comes, wants to know, after knowing does the same thing. It is going on and on.
Some of the numbers are[protected],[protected]
Please note that i am a senior citizen, retired from service and these people are always calling me, disturbing me and even after knowing the exact cause of my leaving is not divulging it to the next caller. I am being harassed by such a group of callers.