Fed up with bad service

I'm waiting for rewardco to call me back on a query I logged more than 4 weeks ago. They upgraded my contact in February and I haven't received my phone since then. Now they tell me I didn't take a new device but I pay more than I previously paid. If I do get them on the line they keep telling me they'll call me back and no one hase called me back! Can someone please contact me. Most of the time if I call your numbers no one pick up....