Worst Service Ever and Very dissaponted

on the 5/5/2015 I was ****** in and my bag was taken inside it was my phone, wallet and ID BOOK, I immediately called 808 customer service to suspend my phone a guy could not assist me because I did not have the IMEI number at that moment, I looked for the IMEI number and I've been calling and calling with no answer and im now afraid that they might use my bank cards as some of my password and pins are stored in the phone,on the 06/05/2015 i went to open a case at police station and they could not assist me because i don't have a reference number that mtn was suppose to give me when they blacklist my phone, ive been calling and calling they not answering, on the 7/05/2015 i went to mtn in menlyn the guy could not assist me as well he said the department that BLACKLIST closed at 5PM BUT YET IVE BEEN CALLING ALL DAY THEY NOT ASSISTING ME BUT I PAY EVERY MONTH AND ALSO PAY INSURANCE, IM VERY FRAUSTATED AT THE MOMENT BECAUSE OF THE SERVICE IM GETTING AND TODAY IS THE 8/05/2015 WITHOIUT HELP,WHAT KIND SERVICE IS THIS?