Instruct: Classify Amazon reviews into positive or negative sentiment
Query: So far doesn't work

I needed and ordered four of these (actually I placed a duplicate order by mistake and got eight of them; see below). I programmed the dip switches to correspond exactly to my old decrepit butstill-functioning unit, and these new ones did not work. I double-checked settings. I put in my own fresh batteries. Nothing. So I am hoping one of the other residents or the manager of condominium complex will be able to get these to work. At this point they do not.Regarding the duplicate order: it was a mistake, pure and simple. I wanted to send the extras back, but seller said I'd have to pay shipping (OK) as well as a $5 restocking fee (not OK). So, if I can get them to work I'm just going to donate the extras to the condominium homeowners' association.