Poor service from standard bank

I called standard bank to change one time pin cellphone contact and they said it can only be done at the branch. I went to the Festival Mall branch in Kempton Park and stood in line for over 3 hours before being helped. After that the one time contact change only works with a laptop, the change is not working on other devices including cellphone banking. I called standard bank to try fix the problem but it has been 40 minutes that I am still holding to get help. It is time to change banks. I cannot accept such poor service from standard bank