MFC border letter request failure

We have been trying for 4 days to get a border letter from MFC.

The main reason for not being able to get the letter is because our new contract has not been registered on their system.

The excuse that they use, is that our insurance is unknown to them.

Yesterday I got a border letter for the car that we sold 7 days ago, using the same unknown insurance.

When I ask to speak to a manager, I just get told nobody is available.