about rate reservation

hello dear partner , this is yasmina luxury camp , we have a problem with rate reservation , i change the rate calendar perhaps two weeks ago to become 90 JD per double room per night on the hole of date April ! and today i receive a reservation from guest with 75 JD per double room per night on date 14 of April , please note on April we arrange the price for double room as 90 JD per double room not 75 JD per double room , this is a problem for our property ! please we need support with this problem, waiting for answer as soon as possible , best regards, yasmina luxury camp