Digital Vouchers cannot be used in-store. I need a refund ASAP.

I chose to select a Woolworths Voucher from my company as they have it as part of their rewards system... Big Mistake!. The R1000 Woolworths Voucher was sent to me via email. When I went to the store (Mall of Africa) I waited in line for over 30 minutes and was then humilaited by both the teller and manager saying there is no proof that the voucher actually belongs to me. I showed them the email and the redemption link. All the voucher details were there but apparently because they did not see my initials and surname I could not use the voucher (although I showed the email and had my ID there). I am going to go on social media and warn as many people as I can not to buy Woolworths vouchers as gifts as apparently then it's okay to treat you like a ******** after you spent 2 hours in their store on a Saturday that you could have used to spend with your family. Watch your social media, I am posting the warnings to people there until 1. I get an answer on why I was treated in this way. 2. How I will get my money back. 3. An apology from the store manager.