Selling me a product but delivering a product that is not what I wanted

I have app**** for a router with home cloud one thing I can say the turn around time was very quick. My problem was that they sent me and email with the manual of the router B315 Huawei and a data usage guide before the router was delivered. On the day of the delivery I received a pocket router and this was not what I wanted or was told I will get. When I informed Home Cloud about this they told me threy dont do the B315 router anymore but did not inform me about this instead they send me the manual and kept my hopes up. Now they want me to keep the pocket router which I actually dont want and the router that was supposed to be given was the one I needed.