Impossible to cancel services.

I really can't believe how terrible your service is.

I requested a cancellation on 2017-11-29 (4 months ago) for my landline, and this still hasn't been performed. I requested another cancellation on 2018-02-13 (1.5 months ago) again for my landline, and still hasn't been performed. I requested that my debit order be cancelled 4 times now with consultants who all said that it was correctly cancelled, and it still hasn't been. I requested an escalation for the cancellation of both my landline and my debit order on 2018-03-07, and still haven't heard back.

Apart from the debit orders going off which is annoying in itself, I've also been charged by the bank for not having sufficient funds in my account, because I didn't think that that debit order should have even gone off.

What are you doing about any of this?