Online product not delivered for 3 months now

Nuviante has got the worst service ever, l have ordered a Nuviante Eyelash Enhancer via online since from 19 July 2020 and l receive the confirmation that my order was successful and was sent a receipt that has the order number and the shipment number and got a response that my order will be delivered in 14 to 21 working days it is now 3 full months since l waited for my order to be delivered. I paid R1003 with my debit card for the Eyelash, it's cost price was R475 so the payment l made includes the shipment l guess cos l was suprised after the debit has been done. I've sent them several emails requesting about when am l going to get my eyelash delivered to me, they responded and said after the order has been done it is no longer their problem l have to liaise with the shipment and sent me this email to request my eyelash which is ***. l sent emails to several email address given by Nuviante but still no help, biotrimlabs said l will receive in 3 weeks time which is today from the last day l sent them an email. I want them to refund me my money back because they failed me for 3 months they don't even give me an update on what is happening, l'm the one who keeps making follow ups.