Upgrade added to account without signed contract

I was offered an upgrade telephonically, which I agreed to, though I did not have enough time to think about it carefully. I was emailed the contract by the telesales agent for me to read through, sign and return. Upon receipt of the contract, I realised that being unemployed, I couldnt afford same, and did not sign and return this contract. I advised the agent accordingly telephonically.<br> But later found out that the contract had been added to my account even though I did not sign the documents, and advised that I changed my mind. I emailed the helpdesk on 22.05 and the telesales agent on 26.05, and further two more times on 28.05, with no response. I then went to my branch, Bayside, for assistance, but still, this contract has not been removed from my account.