Extremely bad service(Pioneer foods customer service)

Recently I called Pioneer foods to inform them of foul tasting Pronutro. They reacted to my call and information I provided but unfortunately I was leaving the country and asked them to contact my wife to sort out the replacement of the 2 X 750g Pronutro regular flavour items. Promises were made to make contact and collect the product and/or drop off replacements and if not a voucher would be sent to cover the purchase. Sadly none of this took place, the customer service dept take calls and are always so sorry and would put the complaint forward to the necessary department to make contact with me and send a voucher. Since my return to SA I have phoned 3 times to clear up the issue but each time I get given hope that it will be sorted, sadly I am **** to each time I call. The person I emailed(Andre) just does not reply to my email as he previously had done. Their customer service is very bad and it appears that the products are also not made with the pride and care they used to be. Very dissapointed and I will do my utmost to avoid any of the products distributed by Pioneer foods in the future and inform as many people as I can about this poor service.