United India Insurance Company [UIIC] — medical claim rejected by the company

I am Vijay Bhalerao .My wife's medical claim for CKD HI-UIC-463852 is rejected for-
1.Any pre existing conditions as defined in the policy until 48 months of continuous coverage of such insured person have elapsed since inception of her first policy with the company.
I have got the claim for CKD in June 2015 Ref.Health India ID 9852594W.
That time i have provided the insurance policies from 2011 to 2014-15.Based on the information my claim was settled in Sept 2015.
Regarding the existing case i am getting different answers from TPA.
First time they raised the issue of CKD for which i gave referance of June 2015 case.Then they raised the issue of continuation for which i gave the details of old policies.Now Yesterday they are rejected the claim with the new reason of Genetic disorder.
Here i want to ask when a clain of 24K is cleared for CKD then why the claim of 240K is not cleared just because it is 240K?
Hence my request is to consider the claim as it is already four month old case & we insure ourselves to get the help in emergency which is not in this case.