Did not receive my prize

Hi<br> <br> I've entered the Castle Lite competition of Republic of extra cold. I used the number under the cap using *120*33338*number# I won and had to choose between Airtime or Data, I then chose Airtime but I never received my airtime its been 4 days now.<br> <br> I called the call centre and they said I will be attended , 4 days down the line I haven't received any feedback from them.<br> <br> I am really disappointed.