Processing of the diaphragm is good

I ordered four of them, which are also come. But when three of them can be inserted from the front no Banana entirely. Exchange does not, the goods can be sent back only to Amazon and you get a credit. Calling the Service Hotline, None, callback, nil. Is the first time that I get stuck on Amazon. The parts are urgently brought to an installation. So I kept the first time. In order to grab the famous commentaries before, all four apertures have the same item number.