Lancet Double Billed MSA for test and I am struggling to get my refunds

At the end of December / beginning of January my daughter and I had Covid tests done, Lancet billed my medical Aid for 4 tests instead of just 2. I have spoken to Discovery and with Lancet and Lancet just says it will be resolved within 10 working days, each day I am phone is - we are reviewing the matter. Till date it is 6 weeks to have my funds refunded to either my MSA or to me.... It is ********* business practice to double claim and then not resolving the matters. Lancet’s reply to my previous complaint: Good day Maryke, thank you for bringing this to our attention. We have escalated the matter. Your reference number is 2 4 7 5 0 7 1