Bad after sale customer services

on 17 of February 2018 i bought 3X 6 packs of Spring meadow Danone for my 3 years old daughter , within a week i realized that the danone were off they had sour sour smell and tasted like maas . I phoned the customer service in spring meadow and i gave them the batch number and they said they will conduct an investigation and get back to me which they never did . I phoned them and I was told that according to them there was nothing wrong with the batch but maybe it something that happen when they were in-transit but however they were going to reimburse me cash since they don't give out vouchers. But from towards the end of February 2018 till today i have never received that reimbur*****t and each and every time i phone it either I am told that the management is busy with the claims or they waiting for Financial manager or some story and they have never call me back , if I don't phone it quite . They customer service is very bad i have called from my cellphone or from my work land line but nothing from them.