Worst customer service

I've been calling for the past 2 weeks to change my number with no success. This morning I called at 8:11 got through to an agent around 9, she did not tell me her name (she's a Xhosa girl) after security checks she said her system is slow I should hold on, she placed me on mute for over an hour. I asked her to check if I've got any refund due to me and change my number.

This is by far the worst customer service I've received. I know she put me on mute and is probably chatting with her friends