Needed to blacklist my phones

My House was broken into back in April and i immediately went to an MTN Outlet in Rustenburg to report this matter as two of my phones bought on contract from MTN were ******.Its been a real struggle to get MTN to simply blacklist the phones so i can claim them back from my insurance which refuses to pay unless the phones are blacklisted.Been waiting for feedback from MTN all this time .What i do not understand is when i bought these phones the deal was simple all i had to do was sign on the dotted line but now that they are ****** no one at MTN is bothered .All i need right now from MTN is feedback.