Amobia's incompetence

I've informed amobia via telephone conversation that we will no longer be making use of their services in december 2018. This was done about 3 months ago, when one of their operators called me and asked if we were still happy with their services. I told her that we will no longer be tenants in that specific apartmemt and therefor will no longer be making use of the wifi services. She said she will take note and inform accounts. However it seemed that they forgot to inform us that somehow we are not allowed to my telephone arrangements. Take note they don't specify or mention this in their contracts.

Now I'm facing debt handover, after making arrangements and also sending an email in November to confirm this. The email got send back because they somehow blocked my email address.

Very unprofessional and ***********. I don't see how this has to become my problem if they can't do their job. The contract also states that services can be arranged to be terminated 20 days prior to. Not specifying via email or telephone.