Double charged on ADSL Account

My ADSL account was transferred from Nashua Mobile last year. Initially all went well but I then received my Telkom account with a charge for \ADSL Faster"that I was already paying with my IS Ignite subscription. I reported it to IS Ignite on 20 April and the last communication I received from them was on 28 April when they told me \""Kindly note we are still waiting for resolution from accounts and we have escalated the query and marked it as urgent. We will revert back to you as soon as we have received any response.\"" I have since queried it on 11 May & 18 May with no response. I have just received my next Telkom account and the double charge is still there for the next month as well."""