Upgrading our weapons,armor,vehicles using game cash

I have just recently started playing Zombie Slayer I also been playing Mob wars for over a year I would like to suggest that instead of having to buy new weapons,armor,vehicles every time a stronger item comes out why not do like in Zombie Slayer and let us Mob wars player upgrade our weapons,armor,vehicles as it is done in Zombie slayer

 

I would like a review of canned reply messages - they are sadly lacking in getting the point across