Standard Bank shocking ***** service

After receiving 4 sms's and a *****ulent Transaction sms from Standard Bank I have now been trying for 3 HOURS to get hold of anybody to just check the transactions. I have phoned 3 numbers (provided on the website and later from my business banker) which either gets disconnected after being answered by a robot or I hold for 10 minutes. I have spoken to a branch manager, Business banker and a person at the one ***** number given to me who referred me back to my banker. This banker has written two emails and suggested I cancel my card after I said that I first want somebody to check whether it really frau (as the transactions dont show on my account) before I cancel the card as it is inconvenient, STILL NO JOY. I have had this acccount for 25 years. I have now had enough. I have cancelled my card now, because nobody has even offered to check, and will be closing my account tomorrow.