Devices and coils not up to standard

I have a twisp user since the first clero was launched. Since then I bought the Aero which was a great device. I then bought a Atom which was also not a bad device. I then gave that one to my mother and bought myself the arcus all-in-one with the Vega batter as this was a special. After not even a month of using the Vega battery it gave in, I returned it and was the tyko, which was OK, but the coils don't last at all, not even a week. Keeping in mind that I also have a cue, arcus and aero which I use every single (all 4 devices). The funny thing is, a couple of days after the warrenty of the arcus was up, the battery stopped working and doesn't want to charge, this device lasted exactly 6 months. Twisp does not want to assist with this. I have even recruited more people to use twisp and I feel I shouldn't have. I got some of my colleagues to use the cue, my mother to use the atom and cue, my boyfriend uses a device also, but he had problems with his take about 7 times and when emailing twisp, they thank him for his feedback with no resolution. We spend so much money on theses devices, but the only last for 6 months. This is a ******* and a money making scheme. I will rather start smoking cigarettes. The coils are also a big problem, they don't even last 2 weeks and that is for someone that uses more than one device. I don't want someone calling me to thank me for my feedback. This is not feedback it is a complaint that needs to be resolved.