Q: What type of unsolicited sales communication is allowed under the NCA?

The reason that I ask: over the past week both my wife an I have received unsolicited mail offering personal loans up to R100k (if you have a salary over R5k), from one particular bank (this bank also happens to be advertising sweet "reduce your debt" ads on TV....)

My understanding is that cold calling is prohibited, what about unsolicited offers via postal mail, or email for that matter?