Respond to H.P. but nothing further

Logged a compliant about a very serious breach of my personal information on Hello Peter.<br> Got a call to say how sorry they are and that I should have been told to put complaint in writing, even though I went to the Vodaworld in Midrand.<br> Was promptly sent the persons email address and asked to send details through.<br> I did this the same day.<br> This email hasn't even been read or is being ignored.<br> I know this because I asked that Sindiswa reply to me confirming receipt at the end of the mail.<br> Seems like the only way to get a call from Vodacom is to complain on Hello Peter!!!<br> What else can I do to get this massive breach resolved?