I bought Honda Accord with Honda plus warranty but...

I bought Honda Accord with Honda plus warranty but when my caliber gone and its cover under honda plus warranty but they said it's not cover and they charge me for that parts and labour and I spoke with manager but he told me I have to talk with honda don't trust on this dealer ship even sales person when they want to sell vehicle they are going to tell false sentence and after few month when you go back they turn back from them sentence and they are not going to give you any help pls pls don't go with dealer ship
Thanks