Dis-chem drops the ball with gift voucher delivery

I purchased a gift voucher online on 20/9 for my sister's birthday (24/9) with instruction to deliver to her cell number on 23/9, the only option. No recipient email details could be provided / not requested. A birthday message was included. *** was received, a notable exception was the recipient cellphone number did not reflect anywhere on the invoice. The order was updated to state that delivery took place but no delivery occurred. I telephoned my sister on 24/9 to wish her and was very upset that she had not received the gift nor birthday greeting. I emailed the Dis-chem Careline on 24/9. By 10h40 on 25/9 no response had been received so I phoned in. I was put through to the online sales desk and dealt with Raquel. She requested an email address for my sister (!) and she emailed through the internet reference number for the voucher. No amount was provided and no birthday greeting was sent. I find this highly unprofessional from a process perspective (no cellphone number on invoice, the lack of recipient email backup message / delivery for SMS which is not a guaranteed delivery) and also the chance to redeem the process today missed the boat entirely, with "Herewith is you voucher code for any purchase made at the Dis-Chem of your choice. We do apologise for any convenience caused." (sic). So whilst the voucher has been delivered, the occasion has been totally spoilt. This process needs to be seriously examined and refined.