Paying for an unknown contract 3 years and counting part 2

On 30th August 2017 I wrote a review here about the frustrations I have gone through with MTN billing me for an unknown contract for almost 4 years now after having gone to several branches to get this issue resolved. MTN responded to that complaint on 3 September 2017 and I was told that they can pick up from their systems that I have laid complaints but the mails were sent to the wrong department (even though I had copied all MTN departments known to me in those emails). I was given a reference number and told this would be resolved in 10-21 working days. MTN also responded saying the unknown line has been suspended. My issues now are as follows: 1. Today is the 26th working day since I had received this feedback (assuming working days are only Mondays to Fridays). 2. At the end of September, the amount for the unknown line was STILL deducted from my account, despite being told the line has been suspended. 3. I received a reference number for this but I was not informed who I can contact for feedback (no email or telephone numbers provided).

This has taken way too long, some feedback would be great!