Unauthorised transaction

We entered our card detail on LinkedIn requesting a monthly debit order only to find that they billed us annually in advance for R6800 we went to FNB branch immediately and requested the reversal of the funds . We were told it would take 7 working day to reflect. On the 7th day the money was not in our account we were then told it would take another 48 hours to reflect once again the money was not in the account. My partner went to the bank to only to be told that it was with the ***** department and it would take another 5 - 10 days to resolve. The assistant branch manager Camisha Naidoo was extremely rude and just kept saying it was out of her hands and showed absolutely no concern towards us as clients. We explained that the transaction was more than likely an error rather than ********** it fell on deaf ears. We will be moving all our personal an business accounts to an alternative bank this service is appalling