No birthday voucher

I did not receive my birthday voucher (birthday was in June), even though I am still a club member and pay my monthly subscription. My mother's birthday was in February and she also didn't receive her voucher. I phoned Edgars on 2 July to enquire about this and was told that the vouchers are being sms'ed these days, so it couldn't have gone lost in the mail. I confirmed my cellphone number with Edgars a month ago and again when I phoned on 2 July so Edgars definitely has my correct number. The lady I spoke to on the phone told me that she will put in a request and that my voucher will be sms'ed to me. I don't understand how it can take so long to sms me my voucher? It has now been almost 2 weeks. And why didn't I receive it in my birthday month (ie June) in the first place? I would really appreciate it if I can get my voucher now as I have been wanting to spend it for a while now. My mom would also appreciate getting hers. It is just one of the benefits that we are expecting as club members and we shouldn't be asking for it.