Poor service from Vodacom

You can not get hold of them on e-mail and when I call customer care they told me they have sent me a mail and I do not receive the mail. All their other correspondence appears in my inbox but not the settlement letter to get them out of my life forever. The no are on my company name and they confirm that but when I receive a invoice only my personal name appears. I have sent a mail in March to fix this and it's not been done yet.