Nedbank -shocking service.

About 8 years ago I had a Power of Attorney to my son drawn up at Nedbank Cascades Branch PMBG. I was ill and have been since then with a serious condition. The only time I leave the house is to visit the Dr or a hospital admission. I have intravenous medication 365 day a year at home. I have difficulty walking. After a stressful encounter with an online ****mer recently I asked Nedbank to block my account. She said to unblock it my son would have to invoke my Power of Attorney at a branch. he tried and now they say I have to go myself. WHAT WAS THE POINT OF doing it 8-9 years ago?? Seems the form has changed. They are as like Home Affairs now. I am furious. If I had the strength I would change to another bank.