Goods not received

I placed an order on the 4th June 2019. Got a reply with a tracking number and that my order was being processed. On the 24th July 2019 after chasing up, I got a response that the product was undeliverable and I must query at La Poste - which is in France and I live in South Africa. Numerous emails followed back and forth with the same response - even giving an alternate delivery address - no action at all. I have subsequently asked for a full refund, as at the 3rd September 2019 I have yet to either receive the goods or get a refund!!