From what I can tell, they are trying to claim payment for renewals that were madejust before I cancelled. I've told them that I do not ackowledge the debt, until they have provided invoices in the first instance (which they are refusing to do) and that I accept them to be true. I have also told them that since I am contesting this debt I will not be entering into communication with arvato, and that if they claim they renewed my domains, they are charging me for goods that haven't been provided as none of the domains are currently registered, so can't have been renewed.
There were about 9 domain names, so potentially there could be further small sums, including a couple of .infos so it could be more, but again they are refusing to tell me anything and just asking me to contact arvato. I've asked them for all sum(s) they claim I owe them in an attempt to figure out the extent of their attempted theft. Is this a matter I can report to the police? or a regulatory body? (given that the domains weren't registered but they still want payment?)