MTN refuse with my Airtime

I took a contract phone with MTN in December 2022 and told them I am getting paid on the 15th. They rather debited my account on the 12th in January and February 2023 until they did nt get the money in March. They have since frustrated me by closing my cellphone lines. I phoned them and they opened the lines BUT the R260 Airtime I bought is gone and they are refusing to return it. I bought airtime on the 29th of March 2023 and the Minutes I bought should expire in 30 days. I have been denied an opportunity to use that. the customer care email, as well as complaints email addresses, are not working. When calling, they ask you all the security questions and in the end, I have not gotten help. Im on ********** and indeed desperate for help.