Poor communication channels for consumer service contact

I have been trying to sort my account for logging in on Transunion South Africa website but no luck. Despite numerous emails sent to Transunion regarding account which does not allow me to login and always sends OTP to the old number that I no longer use and there was no feedback as to why my account is locked and can't be resolved. I have attached documents as per Transunion website for identity purposes but nothing at all, I called ***of which the options they have do not assist and the call drops of after selecting given options for waiting for an agent to assist. I would like to request that someone attend this issue and honestly it's frustrating to look for a credit report update without any reply. I am not happy with Transunion's communication channels for customer service , they are honestly not in customer favour.