IEC Official denied me a vote

I relocated in 2019 to Braamfischer from Diepkloof and I did not change and of my details but voted for the Municipal elections. And now after queueing for over an hour before I go to work; I am told that I need to go and vote at Diepkloof because that is where I'm registered. Not happy at all about that and I do not understand why I cannot vote for the National President at any voting station within the borders of this country.