No Service still waiting on my previous complaint for feedback.

No Service still waiting on my previous complaint for feedback. Today I receive an email to state that my claim will not be paid. The reason being 4: We have not paid this claim because it was not submitted to us in time. Please pay your healthcare provider the outstanding amount if you have not already done so. How should I be reasonable to the account not being submitted on time. Discovery has so many ways not to pay the claims this is unfai!!!