No feedback re my complaint

I took out a prepaid number for my eldest son to use on his mobile phone so that he could be in contact with us. Over December 2017 CellC unilaterally cancelled the number without my permission or consent. Apparently the reason contended for doing this was due to a lack of the number being used. My attempts to get clarity and answers from CellC why this was done have been to no avail. I have lodged written complaints and CellC send you an automated response that they will revert in 24-48 hours, but no one has got back to me.