frustrated

I upgraded my fone to a galaxy tab 4 in december, In january the fone got heated up n screen got blank, same day I took it to richards bay branch, uptil now April , no sign of my fone , richards bay branch sent my fone to gateway to get sorted on, no1 informs me where the fone is and what's happenin, I made numerous calls to vodacom , n gateway , but of no help. I am still getting billed every month for my fone, the data that is coming in from january which I have paid for , according to them, I have lost. I am still getting billed and no fone which is absolutely unfair.