National Insurance Company — Premium amount is very high

Sir,
iam your valuable customer for the past 8 years, i am paying the mediclaim me and my spouse yearly 5200 +, but suddenly they had increased their premium amount is 11, 294, double the paying amount, why the reason, we are middle class family, this is tomuch, if your companu want to grow means why you are giving more trouble to customer this one is very bad, please take this as more important and please help me to reduce the amount
my policy no is[protected]