Stuck in endless lack of support loop

After logging in from:

 

https://inkscroll.zendesk.com/admin/account/billing/subscription  (expired trial)

 

I clicked on Purchase but am getting this page error which tells me to send an email to support@zendesk which then replies back to say 'join us on messaging'. Then I get stuck with your answer bot and cannot connect to an agent because of the expired plan.

 

https://billing.zendesk.com/billing/cart/?issuer=central_admin 

 

I’ve been trying to enter my promo code for the startup program which has now also expired as its been a month. :( 

 

Help please to resolve?