Still NO voucher received

i got a call over 2 months ago by Nandos regional manager Andrew, the offered me a voucher for my recent very unpleasant experience at Nandos Menlyn Mall, where I found a used toothpick in my rice. I thereafter gave my address to customer service was told it will take 7/10 working days, three weeks past no voucher, after posting on hellopeter I get a call apologising and confirming that there was an issue and now the voucher is being sent, this was on the 6th July, Its now the 12th August over a month later still no voucher, is this Nandos definition of an apology? Why does the customer have to chase after something that was sent as an apology to start off with, I asked them several time to hand deliver this to me via courier, I keep on being told it cannot be done they have to post and that takes 7/10 working days, its now 2 months since I spoke to Andrew and still nothing, explain to me how this is okay? I am very horrified by this.