Unhappy Treatment from Afrizon CEO

The most unprofessional CEO I have spoken to. Done a Vodacom contract in March. Received an incorrect voucher with the promo deal,(Home mark gift card) Granted this was a mistake from Vodacom warehouse. After we tried to insist the first time to have the voucher activated, a very helpful callcentre agent assisted us and eventually explained the situation and that the voucher given was indeed incorrect. We then,accepted it and she said she will still bring it under Vodacoms attention to just see, perhaps they will change their mind and give the Homemark gift card voucher in any case. We Cleary said it's ok we understand now but let's try and see. We by no means, after the she explained to us the second time insisted on any amount. MR CEO of Afrizon then phoned my wife 27 May and was extremely rude and unprofessional the way he has spoken to her. Rude, and sarcastic. Mr CEO, I strongly suggest you, as CEO go on some sort of Customer Relelation course to improvebyour approach when speaking to your customers, no matter the situation.