Everyday i loose subscriber count Lot of feed medic Alerts Mailchimp subscri

For almost an year i had a big problem with feedburner.. Everyday on a
certain time, i my feedburner counts start to show 0 subscribers.
After several hours, it updates to a completely different number…
Everyday this happens.. The count goes up and down… Even i get a lot
of feedmedic alerts saying that the feed is unaccessible… But the
original feed is working fine!

Also i have a problem with MailChim count. Everything is set up on the
side of mailchimp.. But its subscriber count is not showing on
feedburner.. I contacted them and they said its the fault of
feedburner!

Can i please get some answers to these problems ? Thanks…