Is hackerstickers.com Safe?

I attempted to buy a shirt from this company. When I didn't receive it or any notification about it in a week I notified them. On the 3rd attempt to notify them, they finally replied and apologized. They said they would ship out the shirt I had purchased the next day. I asked for a shipping number and they didn't respond but I was happy so I left it at that until 10 more days went by and I still hadn't received a package. I responded to them on facebook this time more annoyed. they said they were waiting to send my package because they wanted to give me free stuff and they said they would instead just send me the shirt today. I again asked for a shipping number 4 times and received no reply and a week later when no package showed up and they stopped responding I had to call my credit card company to cancel the payment from my card. Do not use this company. they are a scam.