Poor service at vape cartel

I purchased a “smok” vape about 3 weeks ago and from the first day it gave me problems , tasting and smelling like burn. I replaced the coils thrice out of my own pocket before taking the vape back to Vape Cartel, the sevice was poor and i got no help as to what the problem could be. I am currently sitting with a vape that ive spent lots of money on and cant use due to the problem as explained above and not only was the service poor they also told me to contact smok myself but i bought the product at their store. I would like some help or advise further steps i could take.