Once your fibre is installed you need to activate the line.
You shouldn't need to make changes to your router settings, it should have been pre-configyred so you should just need to play it in and then activate the line.
How to set up your Fibre router - https://help.afrihost.com/topic/fibre-broadband/how-to-set-up-your-fibre-router-for-all-other-providers
How to activate your Vumatel Fibre connection - https://help.afrihost.com/topic/fibre-broadband/how-to-activate-your-vumatel-fibre-connection
If you require further assistance,
please send a message to our WhatsApp helpline: https://whatsapp.afrihost.com
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or see our FAQ page: http://faq.afrihost.com