WORST WIFI , SHOULD BE YOUR LAST OPTION

First, this section is about this website, not the service.  Second, this is not a site for service reviews. It is a site for technical and account support.  If you need to review the site or want to complain or vent, you will get more traction if you go to the many, many sites on the internet where you can do that.  

"My “200 GB” are gone by the first week "

This means you're using 200 GB a week.  The data drains because you are using it.  You may want to figure out where it is going and use it less.  Streaming can use up to 6GB per hour per user.  It's very easy to use a lot of GB a week if you stream or play games.  You can buy tokens if you run out of priority data, but that gets expensive.  Try to budget the monthly amount of data so it will last the whole month.  

Terrestrial internet companies don't want to bother going to rural areas. Your time would be much better spent contacting your local, state, and federal government to bring terrestrial internet to your area.  

As for the latency, that's due to the laws of physics -- you won't be able to change that, and neither will the company.