Why did you let it time out?30 day money back guarantee means just that. If you open a not received case and seller does not respond, then as in the instructions ebay eould have given you after 3 full days, you escalate to ebsy who would refund at sellers expense.
Feedback gets removed if seller appeals to ebay that you have mentioned something not allowed. If leaving negative feedback it is best to keep it brief, “Unsatisfactory transaction” says it all and would not be removed. The more you say means you will use something not allowed, mentioning ebay or opening a case are not allowed, why I have no idea, but ebay makes the rules.
Now all you can do is contact your payment provider, who should be able to start a charge back to get a refund.
