They rejected a claim stating some exclusion condition which is not even mentioned in the exclusion on the policy wording document that I received when buying the warranty

They rejected a claim stating some exclusion condition which is not even mentioned in the exclusion on the policy wording document that I received when buying the warranty. Now their complain department is not even replying. Pathetic service and forcing me to discontinue with them. I also got to know in market that AA is pathetic when it comes to claims.