Bajaj Finserv — Receiving multiple spam calls a day

I have been receiving multiple spam calls from Bajaj Finserv / Bajaj Finance asking me to avail loans as well as promotional calls. I tried to unsubscribe to their calls but unable to do so. Despite blocking many of their numbers, I'm still receiving close to 3-4 calls everyday from different numbers. Bajaj Finance / Bajaj Finserv needs to stop this.