Twisp quality rip-off

I've been using twisp clearo's for past 2 years and the coils have been ok for some time up until the past 6 months. I bougt a 5 pack replacement coil from clicks Chatsworth and it literally lasted me 7 days. This would normally get me through 2 months. I've been to galleria on few occasions and asked them y quality of coils have changed and i get the same answer that its the same coils and I'm not using device properly. Bunch of ****. I've introduced many friends to twisp and i look like an ass now cos they have same issues. supposed to be cheaper than normal cigarettes. I have multiple devices, so faulty device causing coil burns is not a solution. Pls get back to me ASAP. I will definitely like a replacement for that ****ty coils url supply currently. I can as easily refer friends to Kangertech and so on as i did them to twisp. Twisp is ****** expensive and each time a coil burns i have to throw the liquid i fill into atomiser away to refill again with a new coil.