HARASSMENT

I keep getting harassed on a daily basis by a Standard Bank Home Loan agent about underpayment on my bond account. Every couple of months, I get a call from the call centre telling me that my interest rate has increased and that I need to pay a shortfall for such. I have requested that the bank email me written communication that explains and outlines the change in MY interest rate as interest rates in RSA do not fluctuate on a monthly basis. I also receive payment reminders via SMS that I base my payments on but do not match the shortfall that I keep being hounded about telephonically. It is annoying, disruptive and upsetting to keep getting these daily calls and I want written answers to this harassment. I have, on NUMEROUS occasions requested that the bank use my email address for ALL communication as the post office is NOT reliable. They still have a postal address on record as my postal address despite being told that the post box has NOT been in effect for over 4 years.