Don't travel book through vitality

Before covid we purchased tickets to travel overseas for 6 people using holiday travel through discovery. It has been almost 2 years and we have not been able to use our tickets. When contacting holiday travel and discovery they assured us they could refund us and it would take a maximum of 16 wks. We received our reference number but since then no communication and when you can phone the call gets disconnected. Be very careful booking anything through vitality rewards as we have lost a lot of money due to this situation