Business enterprice

I need to change my phone number so that i can link my new device. I emailed FNB at 5 am knowing that their maximum turn around time for that department is 4 hours. After 6 hours I called and was told I wasn't supposed to send 1 email with 2 documents but separate the document... I emailed but still not helped. in one of the calls there was so much background noise I couldn't hear the consultant. I am extremely disappointed with FNB.