Cant switch from one decoder to another with servi

I have moved into a complex. I currently have a HD PVR that needs a dual view cable. The complex only has 1 cable built in which connects to your decoder. I therefore had to buy a new decoder, single view HD, to accommodate the one \cable in"which is in the complex. I basically need to cancel or switch my premium package (on the PVR) to the new decoder / smart card. I'm not going to use the HD PVR decoder and will be using the HD single view new decoder which I've purchase. The premium view package needs to be switch over to the new decoder. I need someone that can assist me because I can't do this online and the call centre can't assist me. I've been told that I can only cancel the premium service on the 9th"