frustrating service provider

our internet was intalled few days ago, it worked for 2/3 days then stopped its been 5 days since it isnt working, i have been in contact with pluxnet on all these days and no one seems to be able to help, each time ill be told to restart, send a picture or video of the router etc then end up being told the matter is escelated, same again the following day. day 6 today and still the same answer im ****ed. why should we still buy mobile data when we paid for internet and the provider cant help