Incompetencent service

Standard bank decided to block my account without any communication done, I went to a restaurant to purchase food quickly and to my surprise my card did not go through I was so embarrassed waiting asking the cashier to keep trying my card as there are funds. This waisted my time until I decide to call the bank, that too wasted my time with all the confirmation required by the bank.... On the call could not even understand the lady due to my fraustion. And I didn't even see the point of them blocking my card like that. This affected my working hours as I thought I would be back at my office in just a few minutes but I took way longer due to card declining and calling standard bank. This is so unprofessional as I am a new standard bank customer and was not impressed!!! I even asked for the manager to call me today from the consultant but still have jot received a call.