Finally some good news, customer service got back to me, they're testing out my pen and it seems to be working. I guess something got loose and I fixed it by cleaning it but didn't actually test it out again before sending it out.
Silly mistake by me. They're gonna do a bit more testing and if it's all good, they'll mail it back to me.
Finally, some good news!
Meanwhile, the SMOK Stick V8's Big Baby Tank is bad.