ALTEC AUTOPGE COLLECTORS HARASSMEN

I had a 2year cellphone contract with ALTEC Autopage which expired and I did not renew,they kept debiting my account even after I cancelled with them through email on 2014 November.On 2014 they acknowledged receipt and cancellation .Fast foward 2015 they they threaten to take me to the [URL Removed] 2016 they harass me with debt collectors like I owe them money.I am furious that I am being hounded like a ******** for not renewing the contract. Now my credit is tained