I bought a defective firearm from GoTenda - they responded within a day and then sent me a return ticket ticket via a Purolator. I was really impressed. My money was refunded as soon as the defective firearm was received.
However, what you have to do is login to your account. They sometimes message you on your account and not directly via email
I have ordered a lot of material from them over the years and they’ve always been very good. They are definitely one of my go to dealers.