Voda is ****ming us

I bought vouchers on vodacom shpo using my voda bucks for restaurant use. The vouchers number didn't show immediately, days went by. I kept on waiting, checking everyday and the text appeared would be that I will get an sms with my vouchers number. Mid September I got vouchers number and it had an expired date but appeared on valid vouchers. I called vodapay they transferred to vodabucks a lady that help me was very hash about it asking me y I kept quiet all this long when I explained that I wasn't quiet I was checking everyday and getting the same text that I'll receive an sms she shouted at me saying I should hv seen that something was wrong and she said she'll escalate the matter, that was a week ago till this date nobody called or explained what's going to happen because there's money also that I paid when buying those vouchers