Disappointed and unhappy

I went there to buy electricity on my tea break..the teller was free to assist for about 6 minutes but seemingly there was something that was to be attended more important than assisting a customer waiting in the queue. I am not happy with this branches service level as this is not the first time I have complained. They think all walk clients have too much time on our hands whereby we can wait for them to finish whatever they are doing before being attended to. I am disappointed and unhappy that I had to leave without being assisted and must again return on my lunch break.