Bad service and communication

My contract expired on the 31 August 2026.I called them to ask not to continue with the contract 30 daysin advance and got a reference number.On the 31 of Audust att 03h00 the contract was terminated without any reason.According to,the contract it was only to be terminated att midnight on the 31 off Ausust.Spend 3 hours on the phone with them just to be transferred from one operator to another without any joy😡