NO REFUNDS

My twisp gave me a burning taste every time I smoked it so at first I thought it was the coils but even if I changed the coils it still gave that burning taste. So I bought new coils and still the same problem. I took my twisp to the stand in Centurion mall and explained to the guy there what I was experiencing with the twisp and the taste and everything. So he tried my twisp and said that it was the coils that is the problem and replaced two of the coils that I've bought. This was within the 6 month warranty period. So still after the new coils it didn't work as it should, there was still that burning taste and it didn't charge correctly and just didn't work. So I took it back this is past the 6 months warranty, the guy said he remembered that I previously brought my twisp back and that it is my twisp that is the problem but he could't really tell the first time. So now they wouldn't refund my twisp cause it is pas the 6 months warranty but he knew the first time I was there that it is the twisp that is the problem and not the coils