No service or replies from the Mandates team

I have been trying to complete a 2025 mandate form. The first transaction was cancelled and now nobody is getting back to me to assist with the new transaction. I have tried phoning- but the phone line does not work. I have sent several emails and sent a request online. I have had no response- My money has been sitting waiting for me since December, with the second transaction being since Monday. The problem and lack of service appears to be a common one- What is Bidvest doing to rectify the issue?