Unauthorised Transactions on my card

On the 03rd of October I received notifications that Hertz was running 17 transactions on my credit card with a total value of R4587.00 not sure what were these transactions for,on Monday I contacted the fines department and spoke to Andiswa and Michelle who confirmed for me that it was a system error on their side and they have since rectified it by instructing the bank to reverse all these transactions....my main concern is not even a courtesy call from Hertz to apologies for such an inconvenience,Michelle was adamant that this was resolved and did not even offer to check with my bank and find out if this instruction was received since the error was on their side and no one is addressing the bank charges that I will be liable to due to this error that is now prejudicing me financially .Communication has been my biggest issue with Hertz and has resulted me in moving my business to Europ Cars because they communicate and do not just go into your credit without communicating with you.

I want this resolved before close of business day today and demand that someone contact me urgently as I need to use my credit card but because its now overdrawn I cannot use it until this is resolved.