When i bought a phone on march 9 they gave us warranty, it was about 79.99, they told us if we get warranty, we get 100$ off will be in the bill. When we got the bill, it was 220$, they didn't take 100$ off , we called them , they told us to go to the original rogers, we went today they said they were supposed to take the 100$ , what do we do now?