Vodacom provides no feedback on repairs

I purchased a Nokia Lumia on contract in November 2014. First it had no sim slider. Wait 4 days for that. Use phone for 2 days and it overheats. Vodacom Paarl refuses to give out of box failure and sends for repairs. While waiting i buy a new lumia cash in order to conduct my business. Receive phone back and screen still faulty. send for repairs. Receive back end December. Use for 3 months and screen stops working. send for repairs. Refuse repair unless I cover cost. <br> Request manager of paarl, and tygervalley to contact me - nothing. Phone customer relations dept for 10 days and receive guarantees it will be resolved each time within one day and has had no feedback.<br> Still without phone and no answer.Job number ***1