Poor business service

After years of good service and referring clients today I am very unhappy. I am a business client that requested a company name change 3 weeks ago. I phoned the business line and they requested I send a mail with ll the document which I did. After a few days of not hearing anything I phoned again and was promised someone will phone me. Nobody did. Again a few days later I mailed again. At least this time I got info back saying they will get back to me in 24 hours. A few days later still nothing. I mailed again and still nothing. Now 3 weeks later and still nobody called or mailed me back. This is really bad service to a company that has been with FNB for years. Maybe it is time to change banks.