Poor Service & Bad behavior

This morning I went to pepcell Newtown junction to recharge, less did I know I'd be treated so badly uby stuff together with their manager, there was only one cashier busy with cellphone purchase with another customer, then another lady came out from the back I asked if I can be helped but she ignored me, looked at me & just walked away without saying anything... Had to wait for the other cashier to complete the cellphone sale to be assisted, I then asked for the manager (Yolanda) as I was unhappy, I explained my story to her & told her how I felt, she stared at me shrug her shoulders and said "sorry ke", I walked away as I walk out of the shop they mumbled some words I couldn't hear & started laughing.