IKEA Did Not Send All Parts for My Tarva Bed and Refused to Help After 14 Days

I was unable to complete the assembly of the IKEA Tarva bed frame due to missing metal components that were supposed to be included in the box. Since I had already disassembled and thrown away my old bed in anticipation of the new one, I am now left without a bed. When I contacted IKEA through their call center, they told me there was nothing they could do because the 14-day period had passed. I don’t understand why the missing part is suddenly my responsibility. Am I required to assemble the product within 14 days? The fault clearly isn’t mine. The form they directed me to doesn't function properly, so I can’t even reach them in writing. This has been a truly frustrating experience in every sense.