Dreadful Service from Call Centre and Managers there

After visiting the strubensvalley branch, I tried calling the branch with various information the salesman required from me. Unfortunately I kept getting through to a call centre who's agent(Umer) asked numerous irrelevant questions. I understand that this is helpful when someone is searching for something and unsure where to find it, but I knew exactly which branch and dept I needed. The call centre agent eventually transferred me to the branch but the line was really bad and sounded like 3 combined lines. I called again, reached the call centre again, and I explained what happened to the previous call. The agent(Sherwin) insisted on going through the various unnecessary questions of what items i was searching for etc. As I realised that this was a useless effort, I decided to go to the actual branch. I then realised that it would be a waste in case there were further requirements from the salesman which means I would have to go back home and then back to the branch again. I called again, obviously reaching the call centre, and asked for a senior whom I could lodge my concerns with. The manager /supervisor refused to speak to me unless i told the agent(Mikaila) the nature of the issue. This is tedious and unnecessary and maybe Builders should relook at the purpose of the Call Centre.