Standard bank running the debit order before month end as agreed

I have started banking with Standard Bank from day of my banking life. It is the second time that I am seriously thinking of moving to another bank because of being a frustrated customer. I have two home loans with STD bank which i have been paying over ten years and i have not miss even one payment to date however last month the bank just unilaterally decided to run the debit orders one day before the month end and the was no money available as it was not agreed date. On the 3rd I took initiative to call Home loan customer care to request them to run the debit order again and the bank must also refund me the penalty for failed debit order. I then received two sms indicating that the debit order will be rerun again. to my surprise even today nothing has happened however i receive a call from call centre that i don't know asking me to verified my details. It is really a irritating me so much because there is so much ***** I don't any business on the phone or online if i did not request help myself.