Woolworths - World of Difference?

I've been a Woolworths account member for many years and for the last couple of years, I have been struggling to get them to send my vouchers to my correct email address. I am receiving vouchers for an alternative customer but never have I received a voucher addressed to me. I received a R50 voucher for completing a survey and to my embarrassment, it did not work at the till point and the cashier kept advising me that I had made use of voucher when I knew I did not.

I've have sent an unexplained number of emails and I have contacted the "switchboard call center" (I call it this because they pass me from department to department until my call finally drops) with no joy.

I am still an avid Woolworths shopper because unfortunately other retailers cannot offer me the quality I receive from them; but I wish I could they could recognize my loyalty and send me my vouchers or at least send it to the correct email address. How can I be a Woolworths customer for so long and not receive one voucher but you are so quick to send me the specials?

Please help me, Woolies!