If it's a single-cam VTEC engine that says ZC on the block, then it's a 1.6 liter.
And yeah, this is why everyone around here recommends buying engines from H-Motors rather than shady, obscure dealers like this Nagasaki Motors. H-Motors would take the engine back and make it right...Nagasaki Motors...not so much...
If you really did order and pay for a dual-cam engine, and they sent you a single-cam motor instead and won't take it back, I'd call them up and throw a fit personally. That's very bad business...