Sears installation and customer service is terrible

I ordered a food waste disposer from Sears and prepaid for installation on November 11. Sears stated that once the part was delivered, I would be contacted to schedule the installation. The part arrived November 21. No one called, so I called Sears. They said someone would contact me. Nothing. I called back, and was given the number of a local installer. The installer said someone would contact me. Nothing. I emailed Sears, I called Sears. I received many "sincere" apologies, and the emails contained 1-800 numbers to call, but they turned out to be simply endless voicemail menus after which a customer service representative would put me on hold and then the call would be dropped. It is now December 21 - six weeks since I ordered the part, and a month since the part arrived. Sears is absolutely the worst. It's maddening that they have had my money for six weeks now and yet I cannot get them to provide the service I paid for. Buyer beware: do not order installation services from Sears!!! Their promises are empty and their customer service representatives appear to be an overseas phone bank with no power to do anything but apologize.