instagram shop

I'm looking to create an Instagram shop selling clothes, accessories, etc. and I need help understanding how to set it up. I started the process but am getting held up and don't understand what I'm missing in regard to proving my company. I was told I don't need a separate website but now I'm being rejected for not having one. There is NO customer support number for me to call. I need help in understanding the process and what's needed in order to set up an Instagram shop that sells clothes. I have it more than half done...I just need a conversation with someone.