PLEASE HELP is there any form of customer service here

Trying to get help as I am placing an order for a client and I seem to have a cap on how much I can order.
Anything over $175 says the order cannot be shipped to the selected address.
But if I take a couple items off and get it under $175 then no error message and the address is fine.
Will pay anyone who can help with this.

Go to your storesettingsShipping and delivery

Check if there’s any price conditions for shipping to that region, that could be causing the error.