ALLHDD Did not received promised refund for failed product Internet

I purchased an order of several Cisco phones from ALLHDD. One of the phones was non-functional upon arrival. I requested an exchange and ordered a replacement from them. ALLHDD approved the return and asked that I ship the phone back, which I did. They did not refund the money for the phone. I continued to request a refund and they would respond with “We need to review with our team”. This went on for 8 months until they finally stopped responding to my requests. I never received the money back for the product that I returned.