Disappointed at the staff in PEP Maponya

I"m disappointed in the staff at Maponya the cashier, her name is Mamosala sold me a router when I got at home there is no router in the box. There was a time I looked away to take chocolate from the shelf I don't know if that is when she took the router out or she just didn't bother to check in the box if the router isn't there now I have to pay transport to go back when it was not necessary to return to the shop