no service at all from MTN

My contract was with Nashua mobile its a pity they closed because since 2008 i have had my contract with them there was no problems at all!<br> <br> last year I upgraded to a Sony Exp Compact i always had a problem with the memory and had to format the phone every month. when I took out my Sim Card 2-3 weeks ago to restart the phone ( as the phone has no battery) when i switched the phone on i received a message the phone is blocked. Even though there was no password on the phone at all the phone blocked.<br> <br> i went in to the nearest MTN store in Carnival Mall next to Mr Price i told the lady what happened and she gave me a telephone number to phone and said i have to speak to the insurance myself although i am paying R150 a month.<br> <br> i then email [Email Removed] and [Email Removed] the the 6/10/2015 to ask them what should i do, but till today i haven't received a response. I went to Auto Page in Springs gate and asked the lady should i be the one to phone the Insurance and tell them to collect the phone at my home and need to pay in a X amount for them to collect the phone then she said not at all the MTN store should send it to the insurance them self.<br> <br> Please advise its been 3weeks