tenant completely unreachable after update PLAID number on partner portal

Hi, i'm a reseller in Italy. I have a partnership  with a local distributor to resell Office 365 product from many years.

On the license side (my panel at vendor) i see my license available yet, like other customers. 

In these days we have changed the PLAID as requested to enable again our partnership.

I've opened the ticket as suggested and after that we have lost completeley the access with any admin of our domain (@noorduffici.com and onmicrosoft.com)

I can't login even in the partner portal of microsoft that reply with ( the mail doesn't exists)

I've tried to call any number of support but anytime I go on with a virtual caller without a solution . 

Someone could hel about this issue ?

The domain is not corrupted because i've access and i change the MX record to work temporaly with mail NOT microsoft.