When ebay restrict an account they send you an email which usually indicates what the cause for restriction is,which will also reflect whether it's terminal or not!
Looking at your feedback you haven't used your account for some time,and when it was active you appear to have been well below the required seller performance standards,which can get accounts restricted
You can try ebay here,https://www.ebay.co.uk/help/eua?id=5275&mkevt=1&mkpid
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