Pathetic customer service

Absolutely pathetic service from Nature's Garden. I sent an email detailing that I bought a packet of Hawaiian stir fry mix and it had no pineapple whatsoever in the entire packet. Someone from their team got back to me and apologised and told me that a voucher will be sent, I enquired about this voucher about a week ago and got absolutely no reply. This is now 3 months after I mailed them and still nothing. I am disappointed in their brand as the whole reason of purchasing the Hawaiian stir fry was for the zest of the pineapple, which they failed to include in their mix. This shows me that Nature's Garden do not care about their customers and in return I will not be purchasing their products ever again.