Mine is not good at ...

Mine is not good at all they came and install the wifi on the 19 June then same day when I come home the wifi is not working then I all they come do something and when I come back again at work still is not working then here on July again they came and try to fix it same when I was coming from work is not working I am still waiting them to come and help me because I really need it before I can look for other wifi if it's not working