Attention to detail

I have a few cars insured with Outsurance. I phoned to ask for a cross boarder letter and without checking on which vehicle to issue the letter on the agent sent me one on the wrong vehicle.. This letter had no expiry date.. I immediately phoned to get a new letter on the correct vehicle issued.. This agent insisted that she could only issue a letter for up to 3 months...After a bit of arguing I accepted that it would be issued for three months.. I have now received the letter on the correct vehicle but now I see it is valid from 5/7/2019 to 5/9/2019,,,THATS TWO MONTHS...Do I phone again? Man this is just a cross boarder letter. HOW HARD CAN IT BE?