Twisp Aero NEVER worked

My wife purchased me a Twisp Aero and the flavours mid to end May 2015. On package of flavour there is a warning product is toxic if swallowed. The twisp leaks and spits fluid into my mouth. Returned ASAP and device was \repaired"by replacing all parts. Received unit and it leaked worse and still spitting. Returned again. After a week and no update returned to be told the R1000 device may not be replaced unless a 40% handling fee is deducted. I didn't ask for money back but an alternative model. I said 40% is ridiculous and that CPA surely wouldn't accept this. Apparently Twisps appointed lawyer has advised this is fair as device is an electronic product and hygiene is to be considered! And I'm told packaging must be considered. I find these people completely non negotiable and so accepted I would take the now \""repaired and tested\"" product and test for 7 days. I'm writing this complaint more as record of events that transpired as I was offered no written communication and my slip was not returned to me. Apparently the people who make decisions may not be contacted??? How can this be in this day and age? Eventually people will stop buying and word of mouth WILL halt sales."""