My situation was similar - I found out about SMR shortly after I received a pair of WD Reds. A few days of frenzied poking about online, then I returned them (within the return period) and had to thus pay return shipping, so I'm out about $16. Not a big deal, all things considered, but irksome, nonetheless.
Got a pair of Seagate IronWolf drives instead.
I wouldn't mind if I was the one that screwed up, but hiding this information wasn't an accident - especially since the Red drives are aimed at NAS, and NAS is where there's a particular problem with CMR SMR. (fixed because I can't type, apparently)