Refund not issued after 7 weeks- British Airways Comair

On the 3 March 2022, I purchased flight tickets through Discovery Vitality to fly to Durban @ R2234.34. A day prior to the flight (22 March 2022), British Airways rescheduled the flight and we decided to re-book with Kulula at an additional cost, since BA did inform their customers a refund would be issued due the issues they were experiencing during the time. BA was contacted on 01 April 2022 regarding the refund - we dealt with a person by the name of Thobeka Dlamini. Their policy stipulates a 4 week turnaround on the refund. It has been 7 weeks and I have still not received my refund with no correspondence from them. Thobeka Dlamini was contacted via email with no response. I would like this matter resolved ASAP!