How can i add wax 2 straightened hair without messing up ??

i tryed today , i strightened my hair and put on wax but then my hair went curly around the front and sides , how can i add wax 2 strightened hair without un-straiteningHow can i add wax 2 straightened hair without messing up ??
Heres a link to superdrug's website, it has aload of hair products:


http://www.superdrug.com/bin/venda?ex=co鈥?/a>





Hope it helped! :)