FNB Unable to Call You Back

I find it terribly upsetting the lack of help FNB provides. My mother contacted FNB support via Secure Chat to get some help on her account. When advised they cannot assist over Secure Chat she asked if an agent can call her back on her cellphone. The secure chat agent said she could not help with that and requested my mother call the call centre. However, my mother explained we do not have a landline and we cannot afford to call that number using a cellphone with limited airtime. The agent still didn't help her and requested she call the call-centre. HOW ARE WE SUPPOSED TO CALL IF WE DO NOT HAVE A PHONE.

I could not find a call me back service on the app, so I decided to leave a review for them here. My parents and I have been an FNB customer for, many years, but if they are not competent enough to simply request a call back for us then I question their ability to handle any banking matters.