Ps: the website shows a red dot near my house(about 500m radius) does this website that their service is available here?
Not necessarily. I've seen people complaining about non-availability of services (or lack thereof), even though their area "had a red dot" on the service map on their website. The only real indicator of set-in services in your area are the abundance of those pamphlets and advertisements near your locality, advertising Excitel. If that's not there, most probably Excitel isn't set-in within your area, yet.