cartracker charging me more .......

Please help me I've been struggling to get help from cartracker ,my contract have been expired and I called them 2 weeks back to downgrade so that I can pay R149 as it was affected by 10% increase they are busy referring me to a person on leave they say I must wait for the lady on leave to come and help me. since last week am using my airtime to call them and they just promise to come back to me when the lady come back from leave am still waiting