Went in and asked for a power supply with an 8 pin...

Went in and asked for a power supply with an 8 pin eps connector and a 24 pin atx connector on a budget, was sold a power supply that did not have a 8 pin wire, even though the worker opened up the box and checked. When I returned the psu the (different) worker said I needed a beefier power supply to have an 8 pin eps. I don't need a beefier power supply, I need one with the right outputs, and somebody who knows what they're talking about would be nice too. In fact, minus one star for trying to upsell me.