Inaccurate information provided to clients

Wanted to apply for a personal loan and requested the bank to give me a calculation on the repayment instalment and interest rate on the amount I wanted to loan. I wanted to known what I will get from Capitec before I apply. I based my decision to proceed with the lenghty application process on the amounts provided by the system. After I spent an hour there to apply for the loan, I was advised that the initial calculations were not accurate and that my monthlynrepayment instalment will actually be R500 more than initial calculation. The additional R500 was out of my budget, so I wasted more than an hour of my time because of inaccurate information/calculations. I honestly feel this is false information and Capitec should provide products according to initial info provided. The service was good, but system generated information incorrect. I asked for this to be escalated, however the attitude was it's not gonna help. Very dissapointed. Head office should look into this and resolve this problem. I want the initial calculations I agreed to to apply.