It's 2 weeks now since the technician came to install the device for the cottage and to my suprise installation wasn't completed

It's 2 weeks now since the technician came to install the device for the cottage and to my suprise installation wasn't completed. I have been following up via WhatsApp and I keep on getting emails about "installation to be done as per agreed time"... What time because nothing was scheduled with me or received any call to schedule installation??? This request has been pending since March now April its almost finished and the installation is not completed and my tenants aren't connected or using the wifi. What is going on really in your company? Why should I beg to be serviced??? I was told to choose a package and pay only for the installation to be delayed, how convenient.