healthyfood cashback does not work

None of my purchases with Pick and Pay healthyfood reflect as cashbacks.<br> I have phoned and emailed about this issue for over a month, but each time I'm told they are investigating the matter, and then.....no response.<br> Last time they said they would get back to me within 5 working days.. its 10 now and still no response.<br> <br> Also, why do I need to email them invoices if the system should assign cashback automatically?<br> <br> email references: -WRefNo#***#- and -MailRef#*** and WRefNo#***#- -MailRef#***