Shocking support.

My debit order datw has always been set for the 1st. This has now been changed this month to the 25th, without my authorization. My account has been suspended this morning. I called into the support to get this sorted. Tried to make a partial payment but I am short of R9.50 for this payment so refusing to assist. I have never missed or been late for a payment and this is the way I get treated. Can this been looked into please as I need my connection to be able to get and access my funds. Service is honestly shocking.