Home loan

FNB wants to cheat me. They went about my Home loan application in an ********* manner. I was offered financing at an interest rate of 11.40% which I based my informed decision on & signed off the documents. But later the Du Toit Attorneys failed to check the discrepancy of the interest rate showing 13.50% on the documents they brought to me to sign off so that the bond could be registered. Now FNB wants me to pay the bond installment at 13.50% & refuse to fix the discrepancies they caused in the first place. I budgeted for an interest rate of 11.40% not 13.50% which is beyond my affordability that's why I agreed to go into business with FNB but now they are acting as *******. I want the interest rate to be corrected immediately before my first installment runs end of the month of January.