Garmin responded after three days, which is ok I guess if you're not in a rush. After clearly stating my issues and the remdies I have employed, their response was to...do precisely what I had already done, and in addition, replace the 2032 battery. The 2032 batteries I have used in the past are not rechargeable, and I'm not going to sink any money into this unit other than to return it for replacement. The hold time on the phone was 20+ minutes.
Let's hope the replacement unit works better.