CellC thinks they can do as they please with your bank account

So just a warning to all CellC customers. CellC just takes off your debit order whenever they feel like it. Today is the TWENTY SEVENTH, my contract with them clearly states THE LAST DAY OF THE MONTH!!!! That is NEXT week, the 31st and not a public holiday nor a Sunday!!!!! But boy let you not pay them according to your contract with them. I'd like to know who gave you the right to debit my account today??????? This is ******* without my permission!!!!!