Absa N1 City Service

I went to Absa N1 City Mall 17/12/2019 for a simple transaction via Western Union. I waited 1h30min in the queue (the bulk teller queue,not forex) and eventually after I had to ask how long still I was told theres only 1 teller who can assist with Western Union transfers,I just left,there was absolutely no urgency and I WAS ACUALLY TOLD this teller is still gona be a while after I waited 1h30min.Most Terrible service I've ever received at a bank.If it was another institution they would have sent one of the 'normal tellers' to assist the bulk teller as they had no queue on their side. Why does Western Union clients have to wait??in a bulk teller line??