Policy Bazaar — spam calls everyday

My husband (Siddhartha bhattacharya) is getting minimum 10 calls from policy bazaar everyday when we clearly said more than once that we are not interested now. They are calling from so many different numbers that even blocking those are of no help. They are calling from some other number the next day. This has been happening since a week and this is very irritating when we are getting such calls during office hours.

Some of the numbers are

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We got calls from so many numbers in just a day. There are many more numbers from which we are getting multiple calls since a week.
We get one more call from this company, we are going to file a case of harassment against them.
Kindly help