Appalling Service at Discovery Call Centre

I called in Yesterday to reset my App to tech support. The message said gone out to staff party call again later. I tried several times and got same issue. I called in again today and it said same message. All I needed to do was access my app and need them to change my old cell number where the OTP was going through.

I called call centre yesterday and then today and got through to agent on both occasions who verified that my cellphone is indeed the new cellphone number.

I asked the agent today (Denny) (my ref for call ***), to please transfer me to Complaints dept to log a compliant and she says she doesn't have their phone number and doesn't know the email address to log a complaint. I must log into my App and register the complaint. I ask her how can i do that as I dont have the OTP going to wrong cellphone to gain access to App. She kept me on the call for a long time trying to ask colleagues the Email address or Phone number for complaints dept and eventually came back andsaid that she will register my complaint and then did nothing and gave me a reference for my call to update cell number ( ***). Im shocked that your employees cannot assist me with complaints procedure. Certainly a disgrace.