Pathetic "customer service"

Minus 10 stars for Standard bank!!! After changing my cellphone number I haven't had access to my internet banking. I tried to resolve this through email as I don't want to put myself at risk of a virus by going into the bank... On 2 separate occasions in December, after taking time off of work, I went to the BT Ngebs Branch in Mthatha only to be told that they can't help me because of network issues... On the 8th of January I took another day off of work to sort out the problem... After being made to wait in a queue for over 3 hours I was eventually "helped" by one of their employees... I requested a new card(which was provided) and for her to update my cell number on my profile and for my OTP pin on internet banking... After wasting my morning and putting myself at risk of a deadly virus, I get home to to do a transfer, and my OTP is still being sent to my old number!!! What the **** do I have to do to get this sorted out, as I refuse to put my health at risk again as well as waste more leave days due to pathetic "customer service"??? I am seriously thinking of leaving this bank, which I have been a loyal customer at, for over 15 years!!! I have sent emails and had zero feedback!!! Get your act together!!!