Leaking device

I purchased a twisp aero and have had problems of it leaking from the very first week .I went back the following week and they replaced the coil with a second hand coil which seemed to solve the problem. The second hand coil only lasted 2 days and I replaced with the spare coil which started to leak as well .I then went back to the store and purchased more coils and still have the problem of it leaking .more fluid leaks out than I vape .I am very unhappy with the product and can't seem to get any help.