CHANGING A DEBIT ORDER!!!!

I have been trying since May 2022 to change the debit order details on my Evolution and Payroll subscription with Sage. I have emailed numerous times and only get an automated response with no further feedback. I have phoned, only to be cut off every time after holding for ages. Again this morning I phoned the numbers as per my invoices and statements, but somehow this is ALWAYS this wrong department. Was cut off again 3 times, when finally being transferred the agent cannot be heard over the phone. I give up, every month my accounts get frozen due to non payment as the debit order is not being changed. How hard can it be to change details to get your money? But when the debit order does not go trough, the emails come in like clock work! Really frustrated!