Hi Kin,
They do not levy any duties only VAT, but they are looking at a new levy for every product that has a mains plug, the levy will be something like R1 per product, when I know more about it I will let you know. Apart from that how are your sales going? If its a bit slow now just hang in, when we started in September 2008 we were lucky if we sold 50 units in a month, now a year later we are doing 20 times that a month.
A tip I learned early on do not spread yourself thin, meaning keep to 2 or 3 models max, find a good one that you happy with and work it, you will have far less headaches and supply issues etc
Also wanted to ask you how much ejuice do you import a month, if you importing more than 2L a month contact me.