iTalk Financial Services review: Service

There is a company called iTalk financial services in a day I receive about 15 calls from different numbers and different agents selling funeral plan saying, they are calling on behalf of Sanlam indie. whenever they call I asked them to remove my number from their system, but unfortunately is like they are working on shifts. I just want them to remove my number from their data base, I don't know this company and I never signed anything with them