MOMENTUM LIFE PREMIUM INCREASE!!!

I am the premium payer for my dads MOMENTUM life insurance policy for the past 16 YEARS!!!. We had failed to receive a notice for the cover increase due to the lockdown and therfore was not able to notify momentum in time not to increase our premium but now we are being FORCED to pay an increase of R600!! I had called the call centre over a month ago stating I just want cover and premium to remain the same as prior to the increase date as thats the option we had chosen on taking the policy. Now they say if we do that we will loose cover!!! COME ON MOMENTUM ITS A DIFFICULT TIME FOR EVERYONE I HAVE BEEN DEBITED R600 MORE FOR 2 MONTHS EVEN AFTER GETTING A BROKER TO ASSIST BECAUSE ITS SO HARD FOR YOUR GUYS TO UNDERSTAND PLEASE HELP OR WE WILL BE FORCED TO CONTACT THE OMBUDSMANS AS THESE ARE EXCEPTIONAL CIRCUMSTANCES!!!