Please would someone from Outlook contact me....

I recently had a mail saying my Outlook.com account was almost full. But as an Outlook Plus customer that was a surprise.

I have since mailed a request for information on this forum - what is my limit under Outlook Plus, how is this compared to Hotmail Plus and what is the current status of my account?

I am now being told that some senders are receiving a message that by account is full. This is now causing me  problem.

Please would someone official make contact

There is no Outlook Plus product mentioned on the list below - why?