Terrible service. Unresponsive feedback.

I have made 2 online purchases in April. I tried to return some items due to fault and non-compatibility. One product was returned to the online warehouse, the refund was processed on their system but I did not receive my money. After much hassle, the other items were accepted by the store, and approx. 2 months later I have not received my refund. After multiple calls to the store, the on-line team and multiple emails, this item remains unresolved.