Lack of response

At the beginning of February I placed an order through the CNA online store. There was an item included in my order which I needed to return. The day after delivery the item to be returned was collected. I was told that the refund would reflect on my Thank U account once the item was received at the warehouse. I waited over a month to receive my new statement only to find it was not reflecting. I have sent multiple emails and have received no help at all, no responses to my query. I am very disappointed with this lack of interest. 2 weeks of waiting and not even a courtesy response to inform me whether my query has been processed or not.