Make sure you shop around when applying for your homeloan and play them off against each other, a lower interest rate will save you a staggering amount of money.
There will be many unexpected expenses, make sure you have a reasonable amount of money saved/available. Things like moving, replacing...
Something similar happened to me with Vodacom a few years ago. My phone needed to be repaired, but somehow they had no record of it despite an active contract and the IMEI number being on said contract. The "helpful" consultant didn't even bother to report back on this leaving me to follow up.
It only makes sense if you're reselling and even then you need volume.
We often ordered batches of servers from one supplier and got decent discounts, but because that's all we really bought it often made little sense to buy things from other suppliers where we got almost no discounts.
Credit is a powerful tool if you use it correctly. A simple example is dumping your salary into your bond and using whatever credit facility for your monthly expenses. As long as you're disciplined and settle in full each month it doesn't cost you anything and saves interest on your bond. Credit...
To clarify, if you have a Cheque/CC bundle and you switch to Fusion you will then have to pay for the Fusion account and CC separately. The Fusion account by itself is only slightly cheaper than the bundle price.