Not sure if anyone can give insight in to what to do/what consumer law is.
I'll try to keep this short and not too convoluted 
I had what i thought was an unsolicited delivery of a Fitness band (worth about £30). There was just a photocopied sheet of paper with a company name I'd never heard of on it, and a random Hotmail address. No invoice included. Looked very dodgy/scam like. I put it to the side awaiting any contact from them. Checked my bank account, no charges.
A week later I was checking the status of an order on Amazon I'd placed for a mobile phone. It showed up as delivered. It had not been.
I clicked through to contact the seller, sent an email letting them know it hadn't arrived.
I then clicked on their shop name, which linked through to an Amazon page with a different company/seller name, the same name that the fitness band was sent from.
There