FNB How can we avoid you at your cost

I have 3 fnb connect sim cards. My sister just passed away and I am getting important calls and infgirmation, but my data is disappearing. I topped up 500mb yesterday and this morning it was depleted. Again topped up 100mb which disappeared immediately. I logged a complaint like this weeks ago then it stopped. Today I cannot get my messages with arrangements and I cannot top up more because it vanishes. They mustn't even think about the app excuse. I phoned private clients which is nothing more than a call centre. Pretty (twice), Bongani, Palesa all promised to get Malcolm or the Ceos office to phone me back which not 1 of them bothered.My personal banker Malcolm doesn't exist. I even phoned a relative at FNB who alas also did noit phone me back. I spent so much on calls and data. I never have and never will need Fnb like I did today.