Mtn Zando voucher

<p>I received a voucher from Mtn on 5 April 2017 that was worth R250 and I could use it to purchase items from Zando. I tried to make a purchase on Zando however I failed to checkout as the voucher was invalid. I sent an email to MTN on 10 May 2017 but I have not received any feeeback. Today I called the call center and I spoke to Nosipho who then advised me to go back to the store I had signed up for the contract. Therefore my question is, is there anyone who can help me telephonically rather than have me drive up and down. </p>