There are a lot of good vaping retailers out there right now. Hopefully, the bad one's get pushed out of business. It's important that we share our experiences, both good and bad so we can get rid of the crappy one's.
For me it's simple. They get one shot at it and if they are too stupid to stand behind what they sell I simply move on and spend my money elsewhere.
Best customer service experiences I have had so far include:
Mount Baker Vapor - TOP NOTCH
Focalecig.com - TOP NOTCH
Discountvapers.com - TOP NOTCH
101Vape.com - TOP NOTCH
All of these vendors have provided excellent customer service in one way or another for me and I continue to spend money with them.