  An elegant model is proposed by extending the Standard Model using the
$\Delta(27)\times Z_3 \times Z_{10}$ symmetry within the framework of the
Type-I + Type-II seesaw mechanism. This model is particularly noteworthy for
its ability to restrict the atmospheric mixing angle, $\theta_{23}$, to
specific values, and provides an explanation for the observed hierarchy of
charged lepton masses. The neutrino mass matrix texture defined by three real
parameters, predicts the three neutrino mass eigenvalues and the two Majorana
phases. Furthermore, the model is tested against the experimental results of
neutrino-less double beta ($0\nu\beta\beta$) decay and charged lepton flavour
violation (cLFV) experiments.
