Voucher issue

I withdrawn the amount of R400 that I usually get for doing my assignments and as soon as I went to Shoprite the voucher declined. I contacted LMA and they said I must just wait for my voucher to bounce back into my account. But guess what it's been day 4 and they called me and said there is no solution to my problem they can't help me in terms of the voucher. Whereas they were the one's experiencing technical problems