Bad service provider

I wish I had no star option because they don't deserve any star,I took a cell phone contract to them and after 9 days of using the phone,it has many faults and I took the phone to shop as I was advised by mondo,then Telkom book the phone for 21 days then the phone was back,but I realise the phone still has problems,I went back to Telkom but they told me that at repair centre they see nothing wrong with it,they advised me to call mondo tell them to come and collect the phone and replace it with a new one,but mondo refused to do so they Telkom must do that,Telkom point at mondo and mondo point at Telkom,the phone has less than two months, Telkom advised me to cancel the contract because mondo doesn't want to help but mondo say if I cancel the contract they gonna charge me for penalties,they I must send the back to repair,it been less two months and the phone has already been to repair centre