Chamberlain Centurion, Bad customer service

This morning i went to Chamberlain’s Centurion, as we walked out my husband saw a door that was marked down, he took a photo of the discounted door , we asked the assistant if its the correct price, he said yes, so my husband went inside to buy the door, then , 2 employees came out try to change the price, when they did not exceed, they took the price down…by confronting the guy in charge he said he can’t give us the price… My concern is is if they can make such a big mistake, and trying to hide it, they can also, put a wrong price that is to much on some products, and you will pay whit out knowing it…. Why hide there mistakes……im very disappointed in Chamberlain Centurion.. and im a regular customer there, from now i will double check all my prices before i pay…. Shame on you CHAMBERLAIN CENTURION