Help Urgent! Idle Timeout getting lots of complaints

Hi, we use Microtik hotspot feature for delivering monthly broadband plans to our customers.
We get a lot of complaints that, they are logged in, but there in no internet.
And most complaints are, they have to login 100 times a day, which pisses them off.

If I check the logs of Microtik, the errors are all IDLE TIMEOUT.

Where do I go and make it like 72 hours Idle Timeout ?

Right now, its set to 00.50.00 by the bandwidth manager guys.
Can I go in and make it 72.00.00 , so the idle timeout only happens after 72 hours and not 50 minutes ?

Can I do that ?
And where do I go and do it in one click ?

IP > Server Profiles or where ?

I need to change both keep alive and idle timeout both to 72 hours.
How do I do it ?