HORRIBLE ONLINE SERVICE FROM EDGARS

During lockdown, Edgars had a 30% sale on their winter wardrobe. I made an online purchase and waited patiently. Edgars was unable to fulfill this order after 5 weeks and the order the subsequently cancelled. I was sent a Gift Voucher for R250.00 for my next online purchase. I've tried on 2 occasions to use this Voucher and my message says "Voucher invalid". I've sent email messages to which I don't get any response. I've called the Online Center. I was told to make another purchase and use the voucher. Still 'voucher invalid' Edgars why send vouchers if we cannot make use of this. Very unhappy with the lack of customer service and feedback from Edgars. You still owe me R250.00.