Hi Akin..Unfortunately, there are a lot of brokers out there that choose to play this version of the shell game. Here's how the back side of your rate works. Brokers very seldom lend their own money. So they have no ability to "lock" that money. The only entity that can is the "investor". That is generally a generic term for the mortgage bank actually funding your loan. When your rate is legitimately locked with a bank, that bank issues a rate lock in writing. What often times happens is the broker will tell you he locked your loan and not do so. He is hoping the rates will go down, keep your rate the same, and pocket more income.It sounds like rates may have moved up on him and the mysterious "investor" backed out. If your rate was locked with a bank, unless your loan criteria didn't match what was locked, that particular loan program disappeared, or the bank went out of business, they don't just dishonor a commitment. I would strongly suggest calling his bluff. You may not get anywhere,but it's worth a shot. I wish you good luck. While I can't help you directly, if you have questions, all my contact info can be found in my web link below.