Dont receive calls from my work landline (possibly other landlines too?)

<p>I logged the following case on the 30th May 2016 following work collegues advising that they cant get through to me on my cell - it just beeps twice on the landline and nothing comes through to my cell not even a missed call or other notification:</p> <p> </p> <p>Case number provided to me - ********** 212<br />Internal case number - FMC ********** 0632</p> <p><br /> </p> <p>I was told this was a technical issue and that the turn around would be 24-48 hours. Called after 2 days and escalated...no feedback a few days later. Then called again and was told it could be a porting issues. The query was also then sent to Porting. Then told it would take 7 to 14 days. Calls keep dropping when I call your call centre too - have to call back and re-explain everything each time to staff that are merely able to say that nothing has been resolved and they will escalate - Escallated 5 times now...and not resolution!</p> <p> </p> <p>I have since escalated to MTN managers and this is still not resolved as of 17/06/2016. During this time my cell (used for work) is rendered useless as cant receive calls from anyone in my company that uses our landlines. </p> <p> </p> <p>When I call the helpdesk from a landline and enter in my cell number it says the number is not a valid Mtn contract number??? I need my phone for work and receiving calls from my work landlines is critical to doing my job.....</p> <p> </p> <p>Resolve this please whether it is a porting issue or technical issue please.</p>