Horrible customer service

Was advertised a 10% discount on first order but after creating account and adding items to cart the discount never appeared. The items I wanted were already on a small sale so I was hoping to get a really good deal. While trying to figure out a solution the items have gone off sale and it’s been well over a week with nothing heard back other than poor responses from the help bubble on the website. And their estimation in response times for both help bubble and emails are abysmal. The help bubble says “4 minute expected response time” and takes days, while email says “we’ll have a response within 48 hours” and has yet to send one more than a week later. Was looking forward to buying since I’ve heard positive things about the brand but with this being the start I may shop elsewhere