This is exactly why you shouldn't wait until the last day. In fact, it's not wise to schedule the first attempt within 2 weeks of the expiry date. If you fail or if the test center has a problem or if you get sick then giving yourself that buffer will be the difference between watching, helplessly, as your cert expires or having a 2nd (or maybe even third) chance.
I really feel for you, but I agree strongly agree with others. Leaving the re-certification until the very last day is not wise and leaves you no room for any failures. You are not the only person to have fallen into that hole. I've got a colleague who left it until the last day and then on the day of exam his car broke down on the way to the test centre. As a result, he has to re-do all his exams from scratch. I do hope, that Cisco will grant you little extension, but to be honest that is not likely, because from their point of view they give you 3 years and that is plenty of time.
I'm so sorry to hear about your experience when you arrived at the testing center. Per the suggestion above, you can definitely open a case online with the Certification & Communities Online Support team to submit your feedback and explain your experience / situation.
For feedback about the testing center in particular, I would encourage you to reach out to Pearson VUE Customer Service.
Lastly, to re-iterate the points made in comments above - It is highly recommended for candidates to give themselves enough time in advance to complete the recertification requirements. If candidates act early, it helps reduce the risk of loosing the certifications (due to expiration) as it will allow extra time and flexibility to retake an exam due to a failed attempt or other circumstances.
All the best!
Cisco Learning Network Moderator