dear hassan bhai
buhat buhat mubarik for getting new car, Allha app ko or appki family ko naseb kare 
also got ur pm and already responded, regret for delay in responce as now a days bit busy in offce , sales below target so doing extra efforts to bring back desired levels 
there are 2 types of car waxes
one is natural waxes drived from a special tree in brazil called carnuaba wax
second kind is man made so called synthetic wax
infact 3rd kind is hybrid ( mixture of both above )
since ur car is in dark colour so u should go for natural carnuaba wax to further deepen darken paint, rest already responded in detail to ur pm responce
will await ur car pics and detailing stuff 
welcome in family