Bad service

I have a cancer policy with platinum life for a couple of years now

I added my mother as the beneficiary however, when she passed away 3 years ago, I contacted platinum life to update beneficiary details and every time an agent from platinum life contacts me after my mother passed away, they would confirm that she is the beneficiary.

Every agent promises that they will update the details but nothing is ever updated, they only interested in upgrading the policy.

I feel like I need to cancel, premiums are debited on time every month but no one can update my details.