Standard Bank Home Loans ******.

I have been banking with Standard since 1990, then a home loan via them for 20 odd years. The loan is nearing the end, but these punks send me sms notices me messages that advise this-Your monthly payment is increasing by 6 rand per month, so I query it, & some ***** in home loans, send me an e-mail advising me how they calculate interest. I am not stupid. I was paying the same monthly bond repayment for months, all of a sudden 6 rand extra, so the complaints gent calls me, I tell him the problem, but he cannot sort it out-They are *****ing our money, & lining there pockets, so there is some ****my stuff going on. I receive an sms this past week, stating that my home loan payment is increasing again, so *** are these people doing? A ****my bunch of ****** at Home Loans, no explanation, just ****my, ****my people working there. Has anyone else experienced this?