I have 5 (yes 5) 8500 Garage Door Openers Mfg 9/30/13 and all have the 888LM Controls Mfg 09/13. 3 out of the 5 have failed. Currently I open those doors with push buttons I have subbed for the 888LM's I have emailed Tech Support twice over the past 3 weeks, but they do not respond. Please help. I really need to speak to a tech support person and get this resolved.