Slow service

On 1 March 2015 I reported on an email to [Email Removed] that an amount of R 1 690.42 was debited on my account instead of R 339.01. This was after unsuccessfully failing to get MTN on 808 for more than 3 hours. I only got feedback on 9 March 2015 with reference number ***. The feedback stated that reasons for the extra amount is due to an additional line taken on the account. I immediately responded on the email stating that I have never taken an an additional account. I even went as far as getting an affidavit and sent it to them stating that I do not know this additional line. However after everything that I have done including follow up email, I have not receive any feedback from MTN. I mean this is a ***** case they should have at least responded by now stating that the additional line has been closed and an ***** investigation has been launched. I had a similar query with Vodacom as this ***** also occurred in Vodacom. I reported the incident on Vodacom on 9 March 2015 and on 10 March 2015, Vodacom called me and verify the information and requested an affidavit. On the same day on 10 March 2015 Vodacom has advised me that the ********** line has been noted.