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We sift the impact of the recent Higgs precise measurements, and recent darkmatter direct detection results, on the dark sector of an electroweak extensionof the Standard Model that has a complex scalar as dark matter. We find that inthis model the Higgs decays with a large branching ratio into dark matterparticles, and charged scalars when these are kinematically available, for anycoupling strength differently from the so called Higgs portal. Moreover, wecompute the abundance and spin-independent WIMP-nucleon scattering crosssection, which are driven by the Higgs and $Z^{\prime}$ boson processes. Wedecisively exclude the $1-500$~GeV dark matter window and find the moststringent lower bound in the literature on the scale of symmetry breaking ofthe model namely $10$~TeV, after applying the LUX-2013 limit. Interestingly,the projected XENON1T constraint will be able to rule out the entire$1$~GeV-$1000$~GeV dark matter mass range. Lastly, for completeness, we computethe charged scalar production cross section at the LHC and comment on thepossibility of detection at current and future LHC runnings.

Excluding the Light Dark Matter Window of a 331 Model Using LHC and Direct Dark Matter Detection Data