CARCHEX Carchex claim denied it should be covered Internet

 I have 2007 Honda Odyssey. I bought Carchex Exclusionalry coverage Titanium Extended warranty plan in 2013.Yesterday March 23 2015 i went to dealer for My Driver passenger side automatic door not closing. When i bought warranty Tavis Middleton has confirmed everything is covered Automatic door, all factory installed components. Except for DVD/RES i will have to buy hitech coverage, so i opted out for DVD/RES coverage.Dealer called assurant for and gave details about the part which is a central roller which is driven by motor to close and open door has worn out due to age and no other cause. Assurant guy asked the cost of part which dealer said 70$ then he said it we cover it for 53.97$ which dealer agreed to do, then he said we dont cover it as its a body part. then same day evening  carchex called me said assurant understood some binding part ask dealer to call assurant for discrepancy. Then dealer called assurant at 6pm and gave details again that its a plastic central roller and asked assurant do you want to retain the part assurant said not required we will get back to on Mar 24 2015, I called them next day and assurant said since the roller is a plastic part hence its not covered. Now my question is Can an Automatic sliding door work without Roller? this part has no Oil consumtpion as well? This Central Roller is not mentioned in any Exclusion list? 

This is a clear case of fraud where Assurant/Carchex does not want to honor the claim. I am not very happy and doubt in near future if there is some major claim these Assurant/Carchex will put there hands up. now i cant even cancel it as they will refund only prorated amount. I WILL SUGGEST DON'T BY CARCHEX, BUY ONLY DEALER EXTENDED WARRANTY that will give you peace of mind and hassle free claim process.