Haven’t received any emails since Thursday

I'm just desperate to get my inbox messages now and didn't receive a helpful reply to my last message on Friday as yet!

I can send emails to external email addresses, when I try and send from outlook to outlook, it doesn't arrive. No messages sent since I stopped receiving inbox messages are showing in my sent items.

I have tried:

- verifying my email address

- changing my junk mail filters

- changing my password

- speaking to live chat support who said they could only help with login issues and couldn't help with this

I think there might be a deeper problem as for weeks my sent box has been full of repeat sends of emails I didn't actually send again, but sent once weeks ago.

Please please help - it's been nearly three whole days!

Thanks

Lizzie