I'm not in Sussex but from checking Google Maps, that postcode doesn't equate to the address you've given (which sounds odd, anyway). The postcode is for a block of flats in ***EDITED**.
I would strongly advise against sending any more money to this person without very good evidence that you're going to get something in return. If you do believe you have been scammed you can contact Sussex police on 00441273475432 or email them contact.centre@sussex.pnn.police.uk
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