WHAT SERVICE???

I completed an online form on the Telkom website last week, 24 May 2018, to be exact, regarding changing my bank details and I still haven't had a response nor confirmation of the updated details. I tried to call them and held for eleven (11) minutes while 'all consultants were busy'. Is there anyone who actually works at Telkom Customer Service? I mean it's so hard to get any service with this company. This is a real concern for me because there will not be any funds in my old account. On the same day, I sent a number of e-mails to different companies and all responded on the same day or the next only Telkom hasn't responded. This is bad service at its worst!