cant even cancel a account the service is that bad

On the 18th of October 2019 we sent a letter cancelling all services and to release the number for porting, because of BAD Service! it is now 13 May 2020 and they are and we are still receiving invoices. i have lodges disputes from January trying to sort this out and now they are telling me we never instructed telkom to cancel the adsl. when the letter states word for word: We would like to cancel the following subscriptions: 1. The telephone line and DSL fastest bundle on line *** we would however like to retain the number and would be porting it to a different service provider. 2. As well as the Yellowpages web service needs to be cancelled and notice given to not renew all printed contracts.

Please tell me where were we unclear!