Overdraft fees never agreed to

I went to standard bank to do a funeral claim for my dad during covid. Almost 3 years ago. I was advised by the consultant to opened an account in order for the funds to pay quicker I then agreed she explain the monthly cost will be about R5. I agreed . It took about almost a month before funds were eventually paid out. I then didn't use the account for a while just to get statement iam overdrawn with this account total amount over R1500. Iam extremely disappointed I contacted them to dispute and was told I also get charged an overdraft fee which is more them my monthly fee which was only suppose to be R5. Could this please be sorted ism willing to pay the monthly fee but not for overdraft fee which I never agrees on and which was never explained. To then I would have never opened the account I do have an account whiche iam quite happy with. To my knowledge you pay for overdraft if you make use of the facility I don't have a facility with standard just a simple account. Pls gix this