Possible scam?

I have a shipment from Ghana that is reported to be stuck in Felixstowe Port, with HMRC VAT to be paid. I have an explanatory letter with details and also a VAT invoice with my name on it. I cannot seem to engage HMRC in any way to either verify or debunk these documents. Is there a way certain to approach this? I have tried the phishing emails suggested. i have tried to make an online account. I live in the US, so have failed at that. Is there any other recourse?

Firstly I do not work for UK customs but am familiar with UK import procedures. If you have a shipment coming from Ghana to the UK then it is normal practice for you or your customer in the UK to have engaged a customs agent/ broker to declare these goods and clear customs. They will usually pay charges and taxes including import VAT on the importer’s behalf and will then ask for reimbursement from you . Alternatively they may ask for these amounts in advance. Who they ask to pay will depend on what has been agreed between you and your customer in the UK. The first recommendation would be to contact the customs agent / broker that is handling the import. Uk customs (HMRC) do not usually engage directly with importers.

Hi. Please contact the imports and exports team using the contact details here :  Imports and exports: general enquiries   . Thank you .