Unfair treatment from agents

I've since cancelled my contract with Blue Lable Connect over 3 weeks back after they delivered a device to me of which is very slow to use and the only thing they've done so far was to lock the sim card. As a good company that offers people cellphone contracts how do you expect a person to use a phone which is slow while expecting the client to pay twice what other agencies offer. Really regret the moment I picked a call from one of your agents regarding this deal.