Frustrating, bad service.

I have been trying since the end of March to cancel a service for which the contract has already expired in 2016. I 1st went into our local MTN in the Kolonnade; then my husband went; but were told that we had to do it by e-mail. I have sent the 1st e-mail on 21 April 2023; got a response from Ashleigh Bell on 24 April 2023; submitted the required docs on 24 April 2023. The amount was however deducted again at the end of both April and May 2023. On 12 May I again received an e-mail from Ashleigh, to which I responded with the same requirements again on June 2, 2023, as I was overseas before that. I have since the 2nd of June had no response.