Managers bad attitude and bad service

Good day, today I went to engen garage in phola mall mpumalanga at around 17:20. There were alot of cars there wanted to fill up petrol, in front of me there were 4cars.i waited for my turn only to arrive and no one cared to help me. After about 5 min I saw a guy on the other isle I asked him what was happening he told me that they were changing shifts and I should wait. I was told that's how the process is and he called in a guy by the name of June. That arrogant guy just came and said "mhnmmm" on my window. I asked is he not the one to assist me and he said no the shift were changing and I should wait with an attitude that is disgusting... I hope he is not in any senior position because I was expecting him to explain what was happening. Why would we wait in a 24hr service station and be told about shifts??? No one letting the clients about whatever they are doing? I mean it's month end and they surely new it's their peak time. I got to my destination late because of engine. If it's your policies to stop operation when changing shifts then someone needs to go back to the drawing board as it's inconveniencing us as clients. And definitely training is needed in the staff there on how to engage with customers. The other one even said to me I should go to the total garage in kwamhlanga if m in a hurry. I mean I am using engen as I know I benefit on clicks and ebucks point. Today Iam very dissapointed and surely will never go to that garage ever.