eBay have a 30 day MBG Money Back Guarantee which is written on the right hand side of every listing and explains how to receive a full refund if you do not receive your item.
Your seller played you with excuses and promises to send, to be honest asking 10 times with no result gave a big clue that they were not going to send the item.
You are way out of eBay's 30 day timeline to receive a refund from eBay, turn now to your payment provider for help with a refund most offer 6 months protection.
Familiarise yourself with eBay's 30 day MBG link below, it can save you a lot of time and money in the future.
https://pages.ebay.co.uk/ebay-money-back-guarantee/
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