Vodacom and its very poor service

Im on a red advantage package. I have no signal in my area. Have complaint 9 times since january 17th 2018. I cannot use my business line as there is no signal in the area, therefore loss of business. Vodacom has acknowledged this and cannot do anything about it until 2019. I cannot get out of my contract as i have another 12 months to go. My handset was ****** 3 months ago and i reported it and now its blacklisted so no handset. Vodacom cannot convert me to a prepaid contract until i pay for the handset although its ******. Is this fair. Im now stuck for another 12 months to pay R999 for something i cannot use. I live in the Boksburg area, Windmill park and have to leave my area to use my cellphone. I cannot make or receive calls. Can someone help as i have failed with Vodacom and is stuck for the next 12 months