Why are they so slow to respond to help at the self scan?

I'm not sure what happened in your situation but usually what makes them respond slower than average is how busy the store is. If there's a lot of people at the store, like rush hour, employees have to open up registers and stop helping at the scan&go. That makes sense because the scan&go 'registers' are self-help, if you needed an employee to help you out you'd go to a regular register. Furthermore, there's, at least whenever I go, someone at every scan&go section. Maybe that was a rare occurrence? Hope you have a better experience in the future. ✌️

Store busy & employees having to help so many of us!

Because Wal-Mart sucks