Amazon's certified refurbished program is neither certified or refurbished by Amazon. As a result, customer service issues get routed through their "A-to-Z" guarantee, delaying any and all action that can be taken to fix problems.The refurbished MacBook I purchased had faulty hardware, however, it took me months before I could confirm it. I went back and forth with Apple support, purchasing different types of usb-c Hubs, using different networks, factory resets, additional troubleshooting, using different devices on the same networks to confirm, back and forth with customer service, and more. I requested a refund. They required I pay for return shipping. I did at a cost of $67. It was delivered three weeks ago. I not have I received the refund.Two weeks ago I opened an "A-to-Z" claim with Amazon, being told I needed to wait 14 days to receive word back. This is already a week after the seller received the item and two weeks after they agreed to the refund. 14 days later, I contact customer service again only to be told they meant 14 business days, or 20 days instead. Now I am on the hook to wait again. I am out $1700, not in possession of the item, and have been toiling for three months trying to figure this out.I finally got fed up and went to Best Buy to get a new MacBook. It works perfectly right out of the box. By trying to save $500 I ended up costing myself much more.According to the certified tracking I paid for when shipping the item back, the seller has had the item in their possession for 30 days. I still have not been refunded.