Miss-Sold An Investment That Did Not Materilise

5 Years ago I made a 60 months fixed investment with Standard Bank. My option was to take all the interest only on maturity. I was handed a printout direct from Standard banks system which showed the interest rate, as well as the total amount of interest that I will receive at the end of the 60 months. It also showed the total value at the end of the period. This figures on this contact, dictated that I would receive 10.091% interest per annum, compounded monthly. However upon maturity you proceeded to only pay me interest on my capital, which completely invalidates the whole concept of compound interest. I feel like I was grossly miss-sold an investment account that did not materialise. The last month I was really trying to sort this out with your Lifestyle Centurion branch. They stand with there answer of "the interest on the fixed deposit was calculated using the principal amount versus the term invested RATHER than being compounded. These are the causes of the difference between your estimated expected interest return and the real interest the bank actually paid upon maturity. So why the hell would Standard bank gave me this summary letter with my total value what I will get and now they decided otherwise.It was because of this figures that I decided to invest with your bank. In this case I will rather warn people to not invest with your bank because I did not received what I was promised. I will not leave it here. I am going to the banking ombudsman with this as I have all my evidence in black and white on paper. This was one hell of a month so far as the communication to try to solve this, was really a disaster from your side. No normal person would ever make such an investment. I regret the day that I decided to use Standard Bank as they do not hold onto their promises.