Did not recieve compensation for damaged goods

I logged a complaint on the 28/04/2015 about a froth box of 500g of Cadbury milk tray chocolates I received as a present for my birthday. Pat emailed back the next day apologising for the inconvenience and promising to post compensation vouchers to the address I provided. To date I received nothing in the post and I sent a follow up email two weeks ago with no response again. The customer service is so poor and does not maintain a positive relationship with their customers . I am a loyal customer to the Cadbury brand as I have always trusted the taste and quality of their products. Since this incident and the poor customer service I have received ,I will no longer be purchasing their products. They do no deserve my support and will rather try other brands that values me.