No follow through on complaint

Beginning of December I had purchased a few bottles of Lipton Rooibos Ice Tea. I had emailed Pioneer about the one bottle being carbonated. On the 14th December I received a call from a customer service agent saying that within 72hrs someone would come to collect the bottle for further investigations and would receive voucher. Well over a month later and still nothing.

Really pathetic service. After so many years buying this product. Time to switch to another brand.