***6 and *** doesn't work

I've been trying since yesterday to get through to ***. This morning I was advised to contact the legal department ***6- the number does not seem to be working. <br> <br> This is another case of a sim card being blocked by someone other than the actual owner of the sim card! In addition we need to trace a caller from an unknown number who has been harassing with over 80 calls in 24 hours (we believe the two incidents are related). As advised, we have already opened a case with the police and would like to proceed. Could someone kindly contact us in this regard.<br> <br> Mtn reference numbers:<br> *** Contact Nazam. (This call was to report the harassment)<br> <br> *** Contact Rachel. (This call was made by an unidentified person who then blocked the sim-card.) - Reference was provided when I called MTN to unblock the sim card.<br> <br> Why is it impossible to get through to those numbers?! Contact number provided in the private section.