Itunes card not working and not help to sort it

I bought an itunes card at CNA Nelspruit Lowveld, we clearly asked the girl if the card was activated she said yes. We then came back to Mozambique were we currently live and then tried to use it (note I always buy my itunes card in picknpay and game and I had never had a problem) then it was telling me it was not activated to contact apple for help. I contacted apple customer service help and they rep**** so quickly telling me that unfortunately since it was an EDCON group they couldn't't help and that I should contact the shop direct for help. I contacted CNA at EDCON group on 21st September 2015 then I received just a reply from CNA telling me that a manager was going to contact me after 5 days nothing sent an email again to both and again I just received an email from CNA telling me a manager was gonna contact me now is the 2nd of November 2015 and I am still waiting for help. I went to PMB 3 weeks ago and I tried to sort it out there at store there they told me they couldn't't help since they have new itunes card layout and mine was old. So I am very tired since I do not live in RSA I cannot be calling or going direct to the shop. It is just annoying. Terrible service.