No refund since July and no help from customer service

I made an order since July I am still waiting on my refund. Every time I call the hotline, I am told someone will get in touch with me or the call drops or to email a person with no response or the refund will be done and now we are the 14th of October and still nothing. Please assist how to go about getting a refund. This is really not normal that an order placed since July hasn't been refunded yet. Invoice or Order Number: ***4 AVON JUSTINE parcel SA***