Unfair treatment

I been going to standard Bank for numerous times to state I am not getting any statements via email via post or sms regarding my home loan in last 6 months my installment has gone up more thqt than 1000 Rands than every time I get a call we didn't debit your account due to insufficient funds I for the hell of me don't know my installation than you get collections calling you that you didn't pay your account if there is anyone that can help to get to the ambadsman to take this matter further enough is enough