Promotion fail!

So when upgrading my phone contract they had a special on the contract, of getting a rugby jersey of my choice! In store said I would receive a voucher and never got any so I went back and they said I need to mail for it. I mailed ********** to get feedback for when I would a voucher for the jersey and this was July 2017, August 2017 I was told it’s still being investigated if my number is valid for the promo. Why would I bother even contacting you then.! Vodacom is quick to take your money and switch your line off if they don’t get the debit order but won’t communicate with customers. Just transfer responsibility over and over. So Vodacom give me my money back or stick to what you offer customers!