Pls can someone with a little bit of intelligence

Id like to speak to someone with just a little bit of intelligence, Im a new client which im slowly regretting. Im trying to log onto online banking but it keeps sending the OTP pin to a incorrect cell nr, That is all im trying to change but NOBODY can assist me, ive been on hold for over an hour, the phone died on fnb side 3 times then ive had to call back, which again I was passed from online banking to general enquiries and back again, im starting to feel like a tennis ball on a court and you guys are playing a game...This is absolutely RIDICULOUS... Then I ask to speak to a manager and I get told to please hold again, then ph dies again....then I phoned back and was put on hold again, so when I was finally answered, I asked if they can call me back, and was told no they cant, How **** is the service really, I apologise for the language but you can understand where it comes from having been on hold for more than an hour and having to phone back numerous times...PLEASE CAN SOMEONE HELP ME ASAP...REALLY, THIS CANT BE HARD