NEGLIGENCE PATHETIC SERVICE FROM FNB

FNB recently has being very negligent dealing with clients ,I had an encounter on Saturday whereby money was deducted off my account for a purchase which I was not aware ,I constantly tried calling ***** as if we have unlimited airtime to hold on for an hour or so without any luck I had to log on my banking app to dispute this transaction seeing that I taught ***** had taken place on my card ,then I get an sms stating my card had being cancelled I don't understand this concept when I only disputed this amount, finally getting through FNB premier the lady advises that there was a fault which transactions resulting in payments going through on Saturday 16/04 that failed to go off on March 27th that's the reason money has being debited off my account, logically if the clients had been advised that there was a problem with the system at that time then maybe I wouldn't of panic and then dispute that same transaction which led to my card being cancelled now I cannot use my card for such negligence on their path no communication whatsoever ,this is the 3rd time my card gets cancelled which is an absolute inconvenience on my path I don't have access to my money should I need it and when I do get a new card I have to pay card fees for their mishaps seriously annoyed with FNB really this not how I anticipated such bad services from them.