Installtion date lies - Can't work or move into my apartment

Once you pay they go quiet. They make you sign a debit order ensuring that they will get their money but after that they do not care about keeping their end of the bargain. I am still waiting for the installation of my unit. What is worse is that I am a remote worker. I depend on my wifi to do my job. I have revolved everything around this installation and they have pushed my schedule back heavily.