Facebook.com redirects to facebook.com/business

Ive had this for weeks now and i have customers who i do Facebook marketing for. So its very important to fix this issue - I've done everything i know now plus what I've researched.
So, overtime i type in facebook.com it redirects to Facebook.com/business the happens on any computer or device i type the address into and it happens on my work connect and at home. I took my laptop into work and it logged in then i logged and tried again and it redirected. So thats two computers at work, bring them home and try and same results.
Just tried my iPad , logged in fine logged out and tried again and bang redirect appears on that . So i can't get to a log in page on any computer.
because i can't even get to a login page.
It is not confined to one computer its any device
Ive used to separate connections , at it does the same thing.
I did once get a login page which asked to confirm which posts were mine , i did this and got in for 5 minutes - logged out and once again the redirect appeared.

I am absolutely stuck now - no help from Facebook . Actually if click ask a question i get the redirect again.
Any help please????????