ATM and dispute - short changed.

Used FNB Doornkloof ATM on Friday 01st July. I requested R3000 withdrawal and R900 given. Phoned their helpline who emailed me a dispute form. I needed the R3000 so went to Pick n Pay Doornkloof and asked for R2100 but this was rejected by FNB as my daily limit is R5000. I thought I had been debited R900. So FNB debited me R99 for the rejection. I emailed the dispute form to their disputes department, received an email saying I will be contacted in five days. today is the 12th and I am still waiting! I have been debited R3000 plus R2000 plus R99. I wonder if I have been lost in their system. How can we help you is their slogan! Try helping me FNB. To prove what you claim!