being billed for a dead phone line

I am really disappointed by the services I have received from telkom. I am billed twice now for a phone that has been off for two months going in for 3. I have queried this and I received a reference number too. All the ohones rae off in our area and I went in to the shop to get a wifi phone twice but they havent been helpful and I was told they will decide if i will get one, my husband runs from home and this is affecting him as well because he cant receive any calls fromm clients who call from landline numbers. Why am I still being billed and why cant they help me but I`m not getting anywhere. I am prepared to pay the account but why should I pay for a area fault when my line is dead