Integrity-less Standard Bank

I have been a client for some 20 years. Recently my home loan was changed unilaterally, quadrupling my monthly repayment. I am told it is because the repayment is now based on the loan amount rather than the outstanding amount. Despite this each month the repayment amount varies. The service I have received from my personal banker and home loans has been shoddy. In my view the bank has fallen foul of the credit act and the consumer protection act. I deeply regret taking my home loan from Standard Bank. I was offered competitive rates from ABSA and FNB, but thought there would be an advantage keeping everything with one bank. Terrible mistake! Despite this I foolishly referred a friend to my personal banker. Two weeks from date of application for a new account, the private banker in question arrived at the UN offices to verify employment! Seriously!