Preorder cancellation

It seems it is impossible to get hold of MWEB. I have been trying for over a month to get hold of these people. Have sent emails, tried calling, left messages on Facebook, tried to chat to someone online and have yet to have any sort of response. I have been trying to cancel my fibre preorder for over a month and now my router has arrived. I have requested that this be collected by them .. no response! How does a business function when there does seem to be any actual humans to deal with any queries?