Bad Service

My fibre was installed about a week ago, the technician left without checking if the connection was successful or whether the device was working. After more than 12 emails back and forth I bumped into their technician in my complex.I asked him to have a look, fortunately He identified that the device was never configured, however, before he left internet was again not available. Apparently the office was supposed to call again and it never happened. Till now I dont have internet access