Dis-Chem - Worst customer service ever!!!!!!

If I could rate them 0 I definitely would. I have a 22-month old baby, and I buy Huggies Gold diapers for him on a monthly basis specifically from dis-chem as they are running a promotion to buy 10 packs of diapers and get the 11th one free (Baby City jumbo packs are much cheaper). In April I qualified for the free diapers, I lost my phone and I went to Sandton city dis-chem to explain my situation and they said that they would my number and they would resend the SMS with the code. To my surprise no sms resent, I went on to Alberton City as i work close to Alberton City and they spun me the same story, guess what, yes, no sms, number still not changed. I then went on to Norwood more than 4 occasions on all occasion, the customer service booth tries to contact the customer service head office and NOBODY answers their phone. To this day, there have been no changes on my profile, no sms for my free packet of diapers. This is extremely disappointing. Why should you have customer service if it doesn't work for the customer.