Poor service- awaiting refund

British Airways Due to flights been cancelled during the month of July and august and the travel ban between provinces, BA promised a refund would be done within 6-8 weeks. It has now been over 8 weeks and the refund has still not been done. I have called on countless occasions to be given the same answer of “it is being processed”. I have also emailed with no success and no replies. For a “world class” airline, their customer service and delivery on promises is exceptionally poor. I want my refund British Airways