Disgusting lack of Service

The "customer care" given by this company is disgraceful. In November I sold an apartment and moved to another. I have literally spent hours on the phone to SADV (I have always waited at least 35 minutes for a consultant), trying to get them to cancel the old service and activate the new. So far I finally got the new service activated, but cannot get the old service deactivated. They bill me every month on a debit order. I have learnt a lesson to NEVER sign a debit order again for anything!!!