India Rehab Centre — disturbing whatsapp messages and calls behaviour

Website:

www.indiarehabcentre.org

This has happened to me several times.
I get calls from Indian Rehab center regarding help for some patient and in middle of the day at work time.
When i tell them to call me later, they send whatsapp and text messages again and again saying following :
-Please show humanity
-God is watching you
-I am joining both my hands
-I am begging
-Dont Ignore it is someone's life

Plus they keep calling from different number each time.On asking to keep my number in DNC for their calling list, they start talking inappropriately like Why am i speaking this way when they are only asking for some help and how heartless i am.I earn so much and i cant help a poor person. Also they send images of the patient.

And mind this, this all happens during the daytime when i am at work and between meetings.
Registering this complaint after tolerating this for 6-7 times and loosing my temper on the caller.
Request the authorities or whoever is reading this to take some action against this organization as they are torturing people for charity.
Charity is our choice and should not be pushed to do the same by using these kind of words.