Ordered product unavailable, no refund and system claims order completed

Ordered a 5 minute chef on 28 Feb 2019. Received mail on 5 March 2019 saying delivery will be on 8 March 2019. Received another mail on same day saying the supplier can not fulfill the order and I can get a voucher or refund.

Received another email with another customers details with the customer stating they want a refund for the same item. Why was my details included in another customers' email?

Requested refund on 7 March 2019. No refund received up to date. Logged into system on 13 March 2019 as no refund or communication received. System says order was fulfilled (completed) for SNR264517.

Definitely not going to get a refund and my courier costs totaling R418. Will have to take legal action against Snatcher