Poor service

A technician was at my house on Friday , he advised us to monitor our WiFi router as it overheats and loose signal, if the problem persists we must let him know and he will come the next day to fix it.We messaged him on WhatsApp on Saturday he did not respond, Sunday he advised that he will be coming to our house today he still did not show up , we pay full price for ****ty WiFi. This is not the level of service that a paying customer should receive ,