I have no words

I'm horrified I went to FNB mall at reds to do a SIM swop,the branch manager Lynette told me they can help the only lady that can do this is not in ,I told her this is very bad because what must I do she told me I need to leave and she doesn't like my tone of voice I couldn't believe this is the way she spoke to clients I took a photo of her,she jump over the table and forcefully grabbed my phone I said she needed to give it back she just smiled and revused this happen while everyone was looking at her some FNB customers actually stood up and left,I managed to grab my phone she treathend me if I post the picture to FNB ,I'm very fearful at the moment I'm not sure how a manager do this to loyal clients please could someone urgently contact me she said if I dont leave she will get security and she did people was very very discussed in her behaviour and not to assist a client