Rain very bad service

The service is up to sh$t.Everytime we requested customer service to phone me I am the one that call them.On 16June I called them and they said the technical team will phone me back the following day and still nobody phone me.I am suppose the be on a 60mbps speed but I do not even get 20mbps.Every night just after 7 my wifi will go off or be less then 7mbps.It is going on since we got 8months ago. At first we paid for 60mbps but was on 30mbps untill today we have not got a credit. I request for a new router a few times because I was told by a customer service agent that they pick up there is some thing wrong with the router that is why we struggle with the internet but still nobody coming back to me.