Cancel order

I ordered a phone/contract and my details weren't captured properly so I was advised in-store to cancel the order/contract and start again because they couldn't do anything in-store. Everything needs to be done over the phone but no one answers or if someone does I am transferred and no one picks up. This is so ****ing frustrating. The in-store reps say they do not have access/rights to cancel the order yet you guys are so quick to sign up people. I am no longer interested in this contract just because of this - it's so hard to get anything done or to get the right person to speak to.