Cancellation and billing

I cancelled my contract number ********** 600 when it ended in August 2018. Currently am still getting bills. Case number ********** 4. Previous case number ********** 4. I have logged this issue and still no response has been given, yet I receive bills. If any of your sales people has automatically issued this contract, kindly note, I have not made any verbal or signed agreement with anyone to renew my contract.

I do not have any mobile device to prove this agreement in any of your stores.