Name incorrect on my bill after multiple calls and enquiries. So fed up

I have logged alot of calls to Customer Care regarding my name being incorrect on my bill and have been falsely reassured after all of my calls ended only to find out the following month (supposedly it takes a month to reflect) that it is still incorrect. I'm so surprised that something so simple could be so difficult to resolve. I can't even use my account statements as proof of residence because it won't match my ID. Such a bed experience.