First of all, Tweezerman doesn't even have their own customer service... You have to contact Zwilling, which I believe is a third party company - I still don't know how it works. Anyway, I placed an order and immediately realized I forgot to put the promo code in. I emailed right away, as well as followed up with a call the next day. They said they need to contact Tweezerman and get back to me if they could either a) give a refund or b) cancel the order so I can re-order with the promo code. They said they would get back to me within 24-48 hours, but no response. I followed up and they once again didn't have an answer for me. I was getting worried it would get shipped and it would be too late to cancel the order. Long story short, they never gave me an answer after several follow up emails. I will not purchase from Tweezerman again after this.