Very poor response and poor authentication from FNB for card transactions

I have been the customer of FNB for last 6+years and Having 3 Business Accounts and 2 private accounts(me and wife) and all other banking items are always with FNB.In addition,all my employees had been encouraged to use FNB. I had logged a ***** case on 28th Sep in which some one from UK used my card online and booked rental car.I had logged a ***** case within few minutes of the issue happened and the transaction was pending for 5 days and I have specifically told them not to approve but it was approved after 5 days.I have been chasing the FNB guys for last one month and I am not getting any proper feedback.They are telling that they are not responsible for this.My questions to them were not answered 1.I never traveled to UK how come by card was used? 2.Why didn't I get a OTP or any type of Authentication before it was approved?.Does this meanFNB Cards are not properly protected with Authentication? 3.Why didn't the transaction was approved after 5 days when I raised a ***** case?

I need a proper response for the queries and I want my money back to account?If not,I will have move all my accounts including my employees,to any other bank which works for the client