Hi, renting a car - I did that with fiat. But you can pay for fuel with Bitrefill vouchers. You need a Total Petrol station and then you ask them if they accept "WICODE" vouchers, if they do, you purchase the voucher on bitrefill for exact the amount of the price of your fuel and then tell the cashier the code. Doesn't work in in Total stations. So ask before buying the voucher.

You can look up BTC Map, there are many coffeshops that accept btc. We stayed at a lot of Africamps sites...glamping...Addo Elephant Park is very nice