Hi,
If you import goods from outside the UK and the courier uses your EORI number on the import documentation then this should produce a C79. The method by which you receive the C79 depends on whether the courier has used the CHIEF system or CDS to import the goods.
You can see guidance here:
Check how to get your import VAT certificate (C79)
If you have not receiced a C79 then there are normally two reasons for this, either the courier has not used the correct EORI number when completing the import documenation or the C79 has been produced but not reached you.
If you have been in touch with the C79 Team then we would recommend contacting your courier to establish any errors they may have made in the process of importing the goods.
Thank you.