Horrible service

I have been with M-Net for years for my 2 properties but they clearly don’t care about retaining their customers. I have changed my phone number and banking details, I need to change my banking details and their system won’t allow me to do anything without me having to enter an OTP. They keep sending the OTP to the same number I need them update, I called the sales department and I managed to speak to someone who said they are putting me through to the support team so they can update my details but I was on hold for 15 minutes until the line got cut off. I sent them a screen shot on twitter and they are not even bothered to call me back rectify the situation, Horrible service !! Only new onboarding customers can speak to a human and have their issues resolved timeously and to those of us who have been with them, we have to deal with a system that doesn’t even make sense! How do you ask me to enter an OTP when I’m telling you that I need to update my information? Ridiculous really !!