No response on Refund requested for the first time on 17 August 2017

Phoned several times on different telephone numbers to cancel two devices which was provided incorrectly. Should have been for upgrade and not new contract. Two months premiums have been deducted although the contract was cancelled within the 7 days as required. Phoned again today for the sixth/seventh/eighth time : Nobody could assist me and the conversations were dropped and no confirmation for refund has been confirmed.