Transunion OTP failure

I have an account with Transunion that I pay for every month but I do not have access to that account because every time I try to log in, an OTP is required and they never send it to my phone. I have called the call centre several times in the past several months and they cannot seem to get it right. This morning I have called three times already and there is still no resolution because when I eventually got through, the agent was not able to help or the phone cut off. Sad in that I pay for a service that I cannot access and nobody cares to follow up.