Lic — non reception of claim since 3 years

This is to inform you that my name is debasmita mahalanabis. My mother used to have a lici policy of policy number[protected]. I was the nominee for that policy and i have no brothers or sisters to share anything. My mother passed away on 20/07/2014. She had ovarian cancer. I do not have my father as he also passed away in 2000. Therefore i had to do all medical related follow-up and other jobs for my mother when she was sick. And at that time the policy got matured. Therefore i was in no position to claim at that point of time. Several times i went to kalyani, west bengal lici office but the only reply that i got was `dates `they asks me to come on every other dates to do follow-up. They also claimed that due to software related issues it is getting delayed. How can i deal with this everytime. I also work somewhere and it is now 3 years since i am doing this follow-up with lici office. I have deposited original lici bond of that policy/ neft details/ letter /and discharge form.in 10th june 2015.