poor customer service

I haven't used any airtime or data bundles since my phone went in for repairs so I don't know how it could have been in service when my micro sim is in my hand bag.I have called your offices they said they will send an email and get someone to call me but once again no one has called me.I want to pay my acc this week so can someone give me the amont.I think it should be around R2350. Please confirm and the IMEI no - ***. When I pay it I want my phone back immed as I have waited 4months for it.I never expected this kind of service from mtn.I have been with mtn a long time. My reply to mtn..mtn has put me threw enough now all my airtime that's I have used and serval days taken off from work to go to the branch and sort the matter out but was awaste of time cause no one could assist me and yet they couldn't even tell me that I needed to pay my acc a simple thing.now mtn is making a loyal customer like me a bad person I do not like this at all.:-(