INSURANCE - CANCEL OF CELLPHONE NUMBER

i have tried on numerous occations to try and cancel my one contract number. i phone 808 and land up at the customer care number, after a while your call gets cut. never mind that the clients are paying for the calls. <br> my son cracked his screen so he contacted the lady from mtn that helped me with my contract, she now tells my son that because i took out my contract after him they moved my insurance from his number to mine number, what a load of *******, my sob is walking around with a R10 000.00 phone and has no insurance. i am so DISGUSTED IN MTN ATTITUDE TOWARDS THEIR CLIENTS. THIS IS TOTALLLY UNACCEPTABLE