I was looking for something to help me extend my WiFi range

I was looking for something to help me extend my WiFi range. I didn’t know what I was supposed to be looking for so I emailed them. The consultant sent me invoices for two products. No explanation of what exactly this products work or what the difference was. No engagment to find out what would work best. No explaination on what additional products I might need. I made a selection and when the product arrived, it said I needed a cable for it to work. Now I must still go hunting for this cord which I could have purchased at FirstShop. I will have to go buy it elsewhere so I don’t pay for delivery twice. It’s great I could email a sales consultant but the sales consultant only helped half way.