Study Loan interest rate / Unfair business practise

I app**** for a student loan from FNB, the interest rate given to me was 7.25% on the quotation. I signed the quotation and accepted the terms of the agreement. FNB then increased the interest rate to 12% due to the institution listed being a private institution and that the studies will be conducted on a part time basis. All this information was given and communicated before hand to FNB. I feel this is unfair business practices and definitly against regulation. I am a loyal FNB account holder and have my entire banking profile with FNB. My study loan has been approved and paid out but after being ******** into a higher interest rate I dont think i want to even do business with FNB any longer.