Indian Overseas Bank — Insurance

Dear Sir,
I am holding Insurance since from 2015 after discussion with your Branch Manager. The premium was Rs 7778 for 5lakhs of insurance. Next year your Manger assure me for good service and told me that after 70 years of edge premium will be same for life time. He told me to me to discontinue all other such policy and continue with I.O.B. only. I respect him and discontinue my Oriental insurance policy which was continued for last 20 years and took other 5lekhs policy at I.O.B. The premium was Rs. 7981 . Manager told me that now it will remain same for life time. I appreciate for good guideline. The insurance company was Apollo Munich. I was happy.
Next year premium was change to Rs 10186 with word that you will get better service, do not bother. I accepted the same.
In 2020 the premium change to Rs 16155.38 with word that Apollo Munich is merge in HDFC and after management discussion at Heat Office it is finalize. Now it will remain same.
Yesterday by tax msg I come to know that now premium is Rs 52817 for me, for two 5 lakhs policy I have to pay Rs 105634.
The change is abnormal. I can get Individual policy for the same or less amount. This is a big cheating with I.O.B. customer. For other bank like Punjab national, Bank of Baroda premium is app Rs 16500 only Which indicate there is some compromise with respected authority with HDFC insurance, otherwise bank can get better option for his customer.
Let me know that how authority can take such decision with ought tanking his customer in confidence..
Now what I have to do? I am not capable to pay such high premium and I discontinue all other insurance. You are responsible for my Life.

Best regards
Umakant Shah