Why haven't I gotten my Lenovo rebate within the last 3 months?

According to the website, my Lenovo rebate was approved at the end of Janury, but I still haven't got my check. I have tried calling customr service, but it has been over 2 weeks since I left my first message and no one has called me back. How can I get my rebate check?
 
sad I’m frustrated
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