PATHETIC SERVICE

I recently upgraded my contract online and was suppose to receive a R250 voucher which i never did i've been trying since saturday to get some one from vodacom to help me but NO ONE knows how to claim to voucher, so WHY do you give vouchers if you do not know how clients can redeem it. Last week i upgraded another 1 of my phones i did not receive it and probably won't receive my voucher on this phone as well a phone 3 times already asking why it is taking so long for my phone to be delivered and all that they can say is they are waiting for confirmation....... If i knew this was the service i was going to receive i would have cancelled all my contracts in stead on upgrading they have pathetic service no one in customer care can assist no one in upgrades can assist so is there any one who can assist....