Hi;
Similar situation here.
I've received and identical message. The only thing is, the phone number differs from yours by the last digit: +27105007818. This number keeps calling my cellular phone. I haven't replied to a single call from this number yet. It's a weird number because it's got the South Africa prefix (27) I don't recognise the 10 prefix.
What made me suspicious - besides the fact that the e-mail message does not come from any of PayPal, AirBnB, SARB or my bank - is that I have been receiving payments via PayPal for some years now, from the USA and from Europe. All this time, I have never been presented with this notice. When a payment is made to my PayPal account, I receive notification from PayPal and, I get my bank foreign exchange desk to receive the transfer into my business account. So, SARB automatically receives notification of this earning through the banking system.
I've made a quick check on SARB web site but, so far, I have only been able to find an MP336(b) form for download. However, this is an "Emigration: Application for foreign capital allowance" form.
I'll check with a forex branch/desk of my bank, on Monday.
For the time time being, though, I'm treating it as a scam.