Dollar Tree — service is terrible, there have been times there are long lines,

Is the bestThere are long lines, I stop by the office and ask for help because there is only one cashier, the manager was in the office I asked if she could help, customer should come first, she said she was busy but will be out when she was done 15 min later still no help I'm 68 years old I've worked at a few stores, the customer comes first, I don't think you have the right person to be manager there should hire a couple more people if need be, it's a wonder you haven't lost more customers there, the Dollar Tree in Moundsville West Virginia