standard Bank does not reactivate credit card

Standard Bank blocked my credit card without any notice or warning during early Marc 2015. I visited the Standard Bank branch at Johannesburg International airport on 23 March 2015. Enquiries counter could not tell why my card was \restricted"and referred me to the telephone to call card division. I did not have time because of flight boarding time. I visited the Menlyn Square Branch on 26 March 2015"