Poor Customer Service Experience

I purchased a motor wheelchair in March from the Webuycars in Richmond Park, Cape Town. On arrival we noticed the wheelchair is not charging. The charger were then replaced days later. This charger also didn't work. The wheelchair were collect in April. The Sales person promised the wheelchair would be delivered near the end of April. He even opted me to collect the wheelchair in Maitland from the supplier. I then requested a refund, of which I am still waiting for close to end of May. I called in to lay a concern and an Agent by name of Vinconique Williams was assigned to the case on the 10th May. I didn't even get a call from her, on the 16th I called her to follow up. Her reason for not calling was "Her PC or system were down" how how beautiful. Still con contact made from the agent as of today. We almost going into June still no refund. Pathetic customer service from a number one car dealership.