Nedbank over charged me

I went inside the bank - Nedbank the Glen on Tuesday around lunch time, I spoke to one of the bankers regarding a credit card and he explained what I needed to get one from their bank. I then asked for a 6 months bank statement and he gave me a three months one and I reminded him that I asked for a 6 months one, I was with my colleague and she asked the banker if he was gonna charge me for three months bank statement that he printed as well and he said No. to my surprise a day later I checked my statement to find out that they deducted 12 rand for each of the pages they printed out however they charged me for 20 pages and when I counted the pages they were just nine of them. they took 240 rand instead of 108. I called and they couldn't explain themselves and told me to go inside the bank. Am really not happy with them. their fees are ridiculous! I wouldn't recommend it for any one.